Hush to Boom home

Every source

267 documents, papers, standards and records behind the numbers on this site.

  1. Neonatal Nurses' Perceptions and Objective Indices of Noise During Quiet Hours in the NICU, Advances in Neonatal Care. Used on Neonatal intensive care unit. Checked 2026-11-02.
  2. The Danger Zone for Noise Hazards Around the Black Hawk Helicopter, Aerospace Medicine and Human Performance (Jones et al., 2018), abstract via Europe PMC. Used on Helicopter. Checked 2026-11-03.
  3. Too loud? Do powered hand dryers violate federal noise exposure standards?, American Journal of Otolaryngology. Used on Hand dryer. Checked 2026-11-02.
  4. Noise levels associated with New York City's mass transit systems, American Journal of Public Health (Neitzel et al., 2009). Used on Subway train (New York), City bus, Inside a car. Checked 2026-11-03.
  5. Impact of Classical Counterconditioning (Quiet Kennel Exercise) on Barking in Kenneled Dogs: A Pilot Study, Animals (2022), via PMC. Used on Dog barking. Checked 2026-11-02.
  6. Sound exposure of symphony orchestra musicians, Annals of Occupational Hygiene (2011). Used on Symphony orchestra, Trumpet, Violin. Checked 2026-11-02.
  7. Power saw noise levels during steel stud cutting tasks on commercial construction sites: a tool characterization from a worker exposure standpoint, Annals of Work Exposures and Health (2024), open access via PMC. Used on Circular saw, Angle grinder. Checked 2026-11-03.
  8. Daily noise dose and power tool characterization of steel stud framers on commercial construction sites, Annals of Work Exposures and Health (2025), open access via PMC. Used on Impact driver, Nail gun. Checked 2026-11-03.
  9. Investigation into the noise associated with airbag deployment: part III - sound pressure level and auditory risk as a function of inflatable device, Annual Proceedings, Association for the Advancement of Automotive Medicine (2003), via PMC. Used on Airbag deployment. Checked 2026-11-03.
  10. Pneumatic rock drill vs. electric rotary hammer drill: Productivity, vibration, dust, and noise when drilling into concrete, Applied Ergonomics (2019), PubMed abstract. Used on Hammer drill. Checked 2026-11-03.
  11. Noise levels in fitness classes are still too high: evidence from 1997-1998 and 2009-2011, Archives of Environmental & Occupational Health (2014). Used on Gym fitness class. Checked 2026-11-02.
  12. Loud Noise Dangers (noise chart), asha.org public information page (credited to the Communication Health Support Association). Used on Chainsaw, Leaf blower, Petrol lawn mower, Tractor, Jackhammer, Shotgun. Checked 2026-11-03.
  13. Vehicle Standard (Australian Design Rule 113/00 - Acoustic Vehicle Alerting Systems for Quiet Road Transport Vehicles) 2024, Appendix A: UN R138/01, Australian Government, Federal Register of Legislation. Used on Electric car (warning sound). Checked 2026-11-03.
  14. Inside the quietest place on Earth, BBC Future. Used on Microsoft anechoic chamber, Air molecules (Brownian motion), Normal breathing, Whisper. Checked 2026-11-02.
  15. Zebra finch song is a very short-range signal in the wild: evidence from an integrated approach, Behavioral Ecology (Loning et al., 2022), via PMC. Used on Birdsong. Checked 2026-11-02.
  16. Noise in the operating room coincides with surgical difficulty, BJS Open. Used on Operating theatre. Checked 2026-11-02.
  17. Sounding off: BYU researchers study the roar of SpaceX's Starship, Brigham Young University. Used on SLS rocket launch (Artemis I). Checked 2026-11-02.
  18. Operating room noise levels in anaesthesia a systematic review and meta-analysis, British Journal of Anaesthesia. Used on Operating theatre. Checked 2026-11-02.
  19. Cal. Code Regs. Tit. 13, § 1028 - Performance Requirements, California Code of Regulations (Legal Information Institute, Cornell). Used on Ambulance siren, Police siren. Checked 2026-11-03.
  20. Science Matters: balloon popping and impulse noise, Canadian Audiologist, Vol. 3 Issue 6 (2016). Used on Balloon pop. Checked 2026-11-02.
  21. Noise - Basic Information (OSH Answers), Canadian Centre for Occupational Health and Safety (CCOHS). Used on How decibels add. Checked 2026-11-02.
  22. White bellbird is the world's loudest bird, CBC News. Used on White bellbird. Checked 2026-11-02.
  23. What Noises Cause Hearing Loss? (archived copy, 31 Dec 2022), CDC National Center for Environmental Health. Used on Threshold of hearing, Normal breathing, Rustling leaves, Whisper, Ticking watch, Quiet library, Dog barking, Cat purring. Checked 2026-11-02.
  24. Not a Quiet Place: Understanding Noise Level in a Newborn Intensive Care Unit (NICU) and Its Relation with Newborn's Vital Parameters, a Pilot Feasibility Study, Children. Used on Neonatal intensive care unit. Checked 2026-11-02.
  25. Can hockey playoffs harm your hearing?, CMAJ (2006). Used on Stadium crowd (record), Ice hockey game. Checked 2026-11-02.
  26. Extremely loud mating songs at close range in white bellbirds, Current Biology (Podos & Cohn-Haft, 2019), via PubMed. Used on White bellbird, Screaming piha. Checked 2026-11-02.
  27. Alan Dante Shatters Record, dB Drag Racing Association (termpro.com). Used on Loudest car stereo. Checked 2026-11-03.
  28. Craig Butler Sets New dB Drag Racing World Record, dB Drag Racing Association (termpro.com). Used on Loudest car stereo. Checked 2026-11-03.
  29. DeWALT DCD999 18 V combi drill instruction manual, DeWALT (manufacturer). Used on Power drill. Checked 2026-11-03.
  30. DeWALT DCD740 cordless right angle drill/driver instruction manual, DeWALT (manufacturer). Used on Power drill. Checked 2026-11-03.
  31. DeWALT DCH263 cordless rotary hammerdrill instruction manual, DeWALT (manufacturer). Used on Hammer drill. Checked 2026-11-03.
  32. DeWALT DCH172 SDS Plus rotary hammerdrill instruction manual, DeWALT (manufacturer). Used on Hammer drill. Checked 2026-11-03.
  33. DeWALT DCS512 12 V circular saw instruction manual, DeWALT (manufacturer). Used on Circular saw. Checked 2026-11-03.
  34. DeWALT DCS570 184 mm cordless circular saw instruction manual, DeWALT (manufacturer). Used on Circular saw. Checked 2026-11-03.
  35. DeWALT DCS7485 cordless table saw instruction manual, DeWALT (manufacturer). Used on Table saw. Checked 2026-11-03.
  36. DeWALT DWE7485 210 mm table saw instruction manual, DeWALT (manufacturer). Used on Table saw. Checked 2026-11-03.
  37. DeWALT DCG409 cordless small angle grinder instruction manual, DeWALT (manufacturer). Used on Angle grinder. Checked 2026-11-03.
  38. DeWALT DCG418 cordless small angle grinder instruction manual, DeWALT (manufacturer). Used on Angle grinder. Checked 2026-11-03.
  39. DeWALT DCF921/DCF922/DCF923 18 V cordless impact wrench instruction manual, DeWALT (manufacturer). Used on Impact wrench. Checked 2026-11-03.
  40. DeWALT DCF809 compact impact driver instruction manual, DeWALT (manufacturer). Used on Impact driver. Checked 2026-11-03.
  41. DeWALT DCF887 compact impact driver instruction manual, DeWALT (manufacturer). Used on Impact driver. Checked 2026-11-03.
  42. DeWALT DCN660/DCN661 18V XR 16 GA finish nailer instruction manual, DeWALT (manufacturer). Used on Nail gun. Checked 2026-11-03.
  43. DeWALT DW615 router instruction manual, DeWALT (manufacturer). Used on Router. Checked 2026-11-03.
  44. DeWALT DCS386 cordless reciprocating sabre saw instruction manual, DeWALT (manufacturer). Used on Reciprocating saw. Checked 2026-11-03.
  45. Fireworks and dogs, Dogs Trust. Used on Fireworks, pets and kids. Checked 2026-11-02.
  46. How does sound in air differ from sound in water?, DOSITS, University of Rhode Island (Wayback Machine copy). Used on Underwater decibels vs air decibels. Checked 2026-11-02.
  47. What are common underwater sounds?, DOSITS, University of Rhode Island (Wayback Machine copy). Used on Underwater decibels vs air decibels, Blue whale call, Snapping (pistol) shrimp, Ship noise underwater. Checked 2026-11-02.
  48. Blue whale (Audio Gallery), DOSITS, University of Rhode Island (Wayback Machine copy). Used on Blue whale call. Checked 2026-11-02.
  49. Fin whale (Audio Gallery), DOSITS, University of Rhode Island (Wayback Machine copy). Used on Fin whale call. Checked 2026-11-02.
  50. How does shipping affect ocean sound levels?, DOSITS, University of Rhode Island (Wayback Machine copy). Used on Ship noise underwater. Checked 2026-11-02.
  51. Ship (Audio Gallery), DOSITS, University of Rhode Island (Wayback Machine copy). Used on Ship noise underwater. Checked 2026-11-02.
  52. Seismic airguns, DOSITS, University of Rhode Island (Wayback Machine copy). Used on Seismic airgun. Checked 2026-11-02.
  53. The Auditory Environment at Early Intervention Groups for Young Children With Hearing Loss: Signal to Noise Ratio, Background Noise, and Reverberation, Ear and Hearing. Used on Classroom. Checked 2026-11-02.
  54. Hearing loss in relation to sound exposure of professional symphony orchestra musicians, Ear and Hearing (2014). Used on Trumpet, Violin. Checked 2026-11-02.
  55. Comprehensive measures of sound exposures in cinemas using smart phones, Ear and Hearing (2014). Used on Cinema. Checked 2026-11-02.
  56. Noise exposure levels in stock car auto racing, Ear, Nose & Throat Journal (Rose et al., 2008), abstract via Europe PMC. Used on NASCAR race. Checked 2026-11-03.
  57. The big potential of the small frog Eleutherodactylus coqui, eLife (2022), via PMC. Used on Coquí frog. Checked 2026-11-02.
  58. Street-level noise in an urban setting: assessment and contribution to personal exposure, Environmental Health (McAlexander et al., 2015). Used on City street traffic. Checked 2026-11-03.
  59. Working Conditions and Health Risk Assessment in Hair Salons, Environmental Health Insights. Used on Hair dryer. Checked 2026-11-02.
  60. Assessment of Occupational Noise Exposure among Groundskeepers in North Carolina Public Universities, Environmental Health Insights (2016), open access via PMC. Used on Chainsaw, Leaf blower, Petrol lawn mower, Strimmer (string trimmer), Wood chipper, Tractor. Checked 2026-11-03.
  61. Decibel Hell: The Effects of Living in a Noisy World, Environmental Health Perspectives (NIEHS). Used on Refrigerator, Normal conversation, Dishwasher, Washing machine, Vacuum cleaner, Hair dryer, Microwave oven, Alarm clock, Garbage disposal. Checked 2026-11-02.
  62. ER20XS High-Fidelity Earplugs, Etymotic (manufacturer). Used on Concert earplugs. Checked 2026-11-02.
  63. Potential health risks of exposure to noise from personal music players and mobile phones including a music playing function, European Commission, Scientific Committee on Emerging and Newly Identified Health Risks (SCENIHR), 2008. Used on Nightclub, Headphones at full volume, Earbuds at full volume. Checked 2026-11-02.
  64. F-35 Noise Measurement Executive Summary, F-35 Joint Program Office (published by the Dutch government, officielebekendmakingen.nl). Used on Fighter jet. Checked 2026-11-03.
  65. Construction Noise Handbook, 9.0 Construction Equipment Noise Levels and Ranges, Federal Highway Administration (US Department of Transportation). Used on Hammer drill, Impact wrench, Chainsaw, Jackhammer, Pile driver, Air compressor, Lorry (heavy truck), Street sweeper. Checked 2026-11-03.
  66. 2.0 Terminology - Construction Noise Handbook, Federal Highway Administration (US DOT). Used on Threshold of hearing. Checked 2026-11-02.
  67. SM210 Spec Sheet, First Alert (BRK Brands / Resideo). Used on Smoke alarm. Checked 2026-11-02.
  68. How Loud Can you go? Physical and Physiological Constraints to Producing High Sound Pressures in Animal Vocalizations, Frontiers in Ecology and Evolution (Jakobsen et al., 2021). Used on Birdsong, Rooster crowing, Lion roar, White bellbird, Screaming piha, Elephant, Wolf howl. Checked 2026-11-02.
  69. Environmental noise and self-rated health in older surgical patients undergoing general anesthesia: a cross-sectional study, Frontiers in Public Health. Used on Hospital ward. Checked 2026-11-02.
  70. Guidelines for Inspection of Companion and Commercial Animal Establishments (Frontiers in Veterinary Science 2018), Table: audible ranges, Frontiers in Veterinary Science (via PMC). Used on Fireworks, pets and kids. Checked 2026-11-02.
  71. LRAD 2000X Extended Range Communication System data sheet (D00164 Rev. E), archived copy, Genasys (manufacturer). Used on LRAD sound cannon. Checked 2026-11-03.
  72. Loudest noise, Guinness World Records. Used on Krakatoa eruption, 1883. Checked 2026-11-02.
  73. Loudest possible sustained sound in air, Guinness World Records. Used on Loudest possible undistorted sound in air. Checked 2026-11-02.
  74. Loudest burp (male), Guinness World Records. Used on Loudest burp (world record). Checked 2026-11-02.
  75. Loudest burp (female), Guinness World Records. Used on Loudest burp (world record). Checked 2026-11-02.
  76. Loudest snoring, Guinness World Records. Used on Loudest snore (world record). Checked 2026-11-02.
  77. Loudest shout (individual), Guinness World Records. Used on Loudest shout (world record). Checked 2026-11-02.
  78. Loudest scream (individual), Guinness World Records. Used on Loudest shout (world record). Checked 2026-11-02.
  79. Loudest animal sound, Guinness World Records. Used on Underwater decibels vs air decibels, Sperm whale click. Checked 2026-11-02.
  80. Loudest industrial ocean noise pollution, Guinness World Records. Used on Seismic airgun, Military sonar. Checked 2026-11-02.
  81. Loudest artificial sound underwater, Guinness World Records. Used on Underwater nuclear test (Operation Wigwam, 1955). Checked 2026-11-02.
  82. Loudest crowd roar at a sports stadium, Guinness World Records. Used on Stadium crowd (record). Checked 2026-11-02.
  83. Roar of the crowd: Seattle Seahawks, Kansas City Chiefs, Sacramento Kings make for noisy two months, Guinness World Records. Used on Stadium crowd (record), Basketball arena (record). Checked 2026-11-02.
  84. Loudest crowd roar at an indoor sports event, Guinness World Records. Used on Basketball arena (record). Checked 2026-11-02.
  85. Quietest place, Guinness World Records. Used on Orfield Labs anechoic chamber, Microsoft anechoic chamber, Haleakalā crater. Checked 2026-11-02.
  86. Inside quietest place on Earth where you can hear your blood pumping and eyes blinking, Guinness World Records. Used on Orfield Labs anechoic chamber, Microsoft anechoic chamber. Checked 2026-11-02.
  87. Loudest insect, Guinness World Records. Used on Rustling leaves, Whisper, Cicada. Checked 2026-11-02.
  88. Loudest purr by a domestic cat ever, Guinness World Records. Used on Cat purring. Checked 2026-11-02.
  89. Coqui frog, Hawaii Invasive Species Council (Hawaii DLNR). Used on Coquí frog. Checked 2026-11-02.
  90. Noise at work: The Control of Noise at Work Regulations 2005, Health and Safety Executive (HSE). Used on dB vs dBA vs dBC, How loud is too loud?, Fireworks, pets and kids. Checked 2026-11-02.
  91. Controlling noise at work. The Control of Noise at Work Regulations 2005. Guidance on Regulations (L108), Health and Safety Executive (HSE). Used on NRR vs SNR. Checked 2026-11-02.
  92. Noise at work: Hearing protection, Health and Safety Executive (HSE). Used on NRR vs SNR. Checked 2026-11-02.
  93. Sound advice: Control of noise at work in music and entertainment (HSG260), Health and Safety Executive (UK). Used on Rock concert, Nightclub, Headphones at full volume, Symphony orchestra, Drum kit, Trumpet, Violin, Piano, Live band in a pub, Piccolo, dB vs dBA vs dBC, How decibels add, How loud is too loud?, Concert earplugs, Fireworks, pets and kids. Checked 2026-11-02.
  94. Noise in engineering, Health and Safety Executive (UK). Used on Circular saw, Angle grinder. Checked 2026-11-03.
  95. An Upper Limit to Sound?, Hearing Health Matters (Wayne Staab, PhD). Used on Loudest possible undistorted sound in air. Checked 2026-11-02.
  96. Hearing range of the domestic cat (Heffner & Heffner, Hearing Research 1985), Hearing Research (abstract via Europe PMC API; PMID 4066516). Used on Fireworks, pets and kids. Checked 2026-11-02.
  97. Loudness, HyperPhysics, Department of Physics and Astronomy, Georgia State University. Used on dB vs dBA vs dBC, How decibels add. Checked 2026-11-02.
  98. Sound Intensity, HyperPhysics, Georgia State University. Used on Threshold of hearing. Checked 2026-11-02.
  99. Design of digital filters for frequency weightings (A and C) required for risk assessments of workers exposed to noise (Industrial Health, 2015), Industrial Health (via PMC). Used on dB vs dBA vs dBC. Checked 2026-11-02.
  100. Optimizing smoke alarm signals: Testing the effectiveness of children's smoke alarms for sleeping adults, Injury Epidemiology. Used on Smoke alarm. Checked 2026-11-02.
  101. Impulse noise generated by starter pistols, International Journal of Audiology (2013), author manuscript via PMC. Used on Starter pistol. Checked 2026-11-03.
  102. Differential effects of suppressors on hazardous sound pressure levels generated by AR-15 rifles: Considerations for recreational shooters, law enforcement, and the military, International Journal of Audiology (2016), PubMed abstract. Used on Suppressed rifle. Checked 2026-11-03.
  103. The reduction of gunshot noise and auditory risk through the use of firearm suppressors and low-velocity ammunition, International Journal of Audiology (2018), author manuscript via PMC. Used on Rifle, Suppressed rifle. Checked 2026-11-03.
  104. Noise producing toys and the efficacy of product standard criteria to protect health and education outcomes, International Journal of Environmental Research and Public Health (2013). Used on Toy cap gun, Headphones and kids, Fireworks, pets and kids. Checked 2026-11-02.
  105. University Marching Band Members' Noise Dosages and Hearing Health-Related Knowledge, International Journal of Environmental Research and Public Health (2021). Used on Marching band. Checked 2026-11-02.
  106. Occupational exposure to noise from authorized emergency vehicle sirens, International Journal of Occupational Safety and Ergonomics (Górski, 2014), abstract via Europe PMC. Used on Ambulance siren, Police siren. Checked 2026-11-03.
  107. Hazardous noise exposure from noisy toys may increase after purchase and removal from packaging: A call for advocacy, International Journal of Pediatric Otorhinolaryngology. Used on Noisy toys. Checked 2026-11-02.
  108. Inner ear damage from toy cap pistols and fire-crackers, International Journal of Pediatric Otorhinolaryngology (1991). Used on Firecrackers, Toy cap gun. Checked 2026-11-02.
  109. Lethal in Disguise 2: Disorientation devices factsheet, International Network of Civil Liberties Organizations and Physicians for Human Rights. Used on Stun grenade (flash-bang). Checked 2026-11-03.
  110. The Loudest Air Raid Siren Ever Built Used Chrysler V8 Engines To Warn Americans Of Impending Nuclear Doom, Jalopnik. Used on Chrysler air raid siren. Checked 2026-11-03.
  111. Effectiveness of Earplugs in Preventing Recreational Noise-Induced Hearing Loss: A Randomized Clinical Trial, JAMA Otolaryngology - Head and Neck Surgery (2016). Used on Music festival, Concert earplugs. Checked 2026-11-02.
  112. Space Launch System acoustics: Far-field noise measurements of the Artemis-I launch, JASA Express Letters (Gee et al., 2023) via PubMed. Used on SLS rocket launch (Artemis I). Checked 2026-11-02.
  113. Starship super heavy acoustics: Far-field noise measurements during launch and the first-ever booster catch, JASA Express Letters (Gee et al., 2024) via PubMed. Used on Sonic boom. Checked 2026-11-02.
  114. Starship Super Heavy acoustics: Comparing launch noise from Flights 5 and 6, JASA Express Letters (Gee et al., 2025) via PubMed. Used on SLS rocket launch (Artemis I). Checked 2026-11-02.
  115. Noise in the animal shelter environment: building design and the effects of daily noise exposure, Journal of Applied Animal Welfare Science (Coppola et al., 2006), via PubMed. Used on Dog barking. Checked 2026-11-02.
  116. Analysis of Output Levels of an MP3 Player: Effects of Earphone Type, Music Genre, and Listening Duration, Journal of Audiology & Otology (2018). Used on Earbuds at full volume. Checked 2026-11-02.
  117. Does snoring intensity correlate with the severity of obstructive sleep apnea?, Journal of Clinical Sleep Medicine. Used on Snoring. Checked 2026-11-02.
  118. Objective measures of cognitive performance in activity based workplaces and traditional office types, Journal of Environmental Psychology. Used on Private office, Open-plan office. Checked 2026-11-02.
  119. The Cry of the Child and its Relationship to Hearing Loss in Parental Guardians and Health Care Providers, Journal of Evidence-Informed Social Work. Used on Crying baby. Checked 2026-11-02.
  120. The startle reflex in echolocating odontocetes: basic physiology and practical implications (Journal of Experimental Biology, 2020), Journal of Experimental Biology (via PMC). Used on dB vs dBA vs dBC. Checked 2026-11-02.
  121. Assessment of noise in the airplane cabin environment, Journal of Exposure Science & Environmental Epidemiology (Zevitas et al., 2018), abstract via Europe PMC. Used on Aeroplane cabin. Checked 2026-11-03.
  122. Evaluation of Software-Optimized Protocols for Acoustic Noise Reduction During Brain MRI at 7 Tesla, Journal of Magnetic Resonance Imaging. Used on MRI scanner. Checked 2026-11-02.
  123. Adding insult to injury: cochlear nerve degeneration after "temporary" noise-induced hearing loss (Kujawa & Liberman, J Neurosci 2009), Journal of Neuroscience (via PMC). Used on How loud is too loud?. Checked 2026-11-02.
  124. Occupational and recreational noise exposure from indoor arena hockey games, Journal of Occupational and Environmental Hygiene (2013). Used on Ice hockey game. Checked 2026-11-02.
  125. Assessment of noise exposure for basketball sports referees, Journal of Occupational and Environmental Hygiene (2016). Used on Basketball arena (record), Referee's whistle. Checked 2026-11-02.
  126. Hazardous exposures and engineering controls in the landscaping services industry, Journal of Occupational and Environmental Hygiene (2025), open access via PMC. Used on Table saw, Chainsaw, Leaf blower, Petrol lawn mower, Electric lawn mower, Strimmer (string trimmer), Wood chipper. Checked 2026-11-03.
  127. Ototoxic occupational exposures for a stock car racing team: I. Noise surveys, Journal of Occupational and Environmental Hygiene (Van Campen et al., NIOSH, 2005), abstract via Europe PMC. Used on NASCAR race. Checked 2026-11-03.
  128. Noise and low-frequency sound levels due to aerial fireworks and prediction of the occupational exposure of pyrotechnicians to noise, Journal of Occupational Health (2016). Used on Fireworks display. Checked 2026-11-02.
  129. Lombard effect, ambient noise, and willingness to spend time and money in a restaurant, Journal of the Acoustical Society of America. Used on Busy restaurant. Checked 2026-11-02.
  130. Noise levels in Johns Hopkins Hospital, Journal of the Acoustical Society of America. Used on Hospital ward. Checked 2026-11-02.
  131. Auditory hazard from airbag noise exposure, Journal of the Acoustical Society of America (1999), PubMed abstract. Used on Airbag deployment. Checked 2026-11-03.
  132. The acoustics of the snapping shrimp Synalpheus parneomeris in Kaneohe Bay (Journal of the Acoustical Society of America, 1998; abstract via Crossref), Journal of the Acoustical Society of America (Au and Banks, 1998). Used on Snapping (pistol) shrimp. Checked 2026-11-02.
  133. Acoustic properties of humpback whale songs, Journal of the Acoustical Society of America (Au et al., 2006) via PubMed. Used on Humpback whale song. Checked 2026-11-02.
  134. Air-borne sound generated by sea waves, Journal of the Acoustical Society of America (Bolin & Åbom, 2010), via PubMed. Used on Ocean waves. Checked 2026-11-02.
  135. Source level and vocalizing depth estimation of two blue whale subspecies in the western Indian Ocean from single sensor observations, Journal of the Acoustical Society of America (Bouffaut et al., 2021) via PubMed. Used on Blue whale call. Checked 2026-11-02.
  136. Underwater noise of small personal watercraft (jet skis), Journal of the Acoustical Society of America (Erbe, 2013), abstract via Europe PMC. Used on Jet ski (under water). Checked 2026-11-03.
  137. Saturn-V sound levels: A letter to the Redditor, Journal of the Acoustical Society of America (Gee et al., 2022) via PubMed. Used on Saturn V launch. Checked 2026-11-02.
  138. The monopulsed nature of sperm whale clicks, Journal of the Acoustical Society of America (Møhl et al., 2003) via PubMed. Used on Sperm whale click. Checked 2026-11-02.
  139. Blue and fin whale call source levels and propagation range in the Southern Ocean, Journal of the Acoustical Society of America (Širović et al., 2007) via PubMed. Used on Blue whale call, Fin whale call. Checked 2026-11-02.
  140. Evaluation of smartphone sound measurement applications (apps) using external microphones - A follow-up study (Kardous & Shaw, J Acoust Soc Am 2016), Journal of the Acoustical Society of America (via PMC). Used on How loud is too loud?, Phone decibel meters. Checked 2026-11-02.
  141. Evaluation of smartphone sound measurement applications (Kardous & Shaw, J Acoust Soc Am 2014;135(4):EL186), Journal of the Acoustical Society of America (via PMC). Used on Phone decibel meters. Checked 2026-11-02.
  142. Source levels of fin whale 20 Hz pulses measured in the Northeast Pacific Ocean, Journal of the Acoustical Society of America (Weirathmueller et al., 2013) via PubMed. Used on Fin whale call. Checked 2026-11-02.
  143. Pilot survey of subway and bus stop noise levels, Journal of Urban Health (Gershon et al., 2006). Used on Subway train (New York), London Underground, City bus. Checked 2026-11-03.
  144. Aerodynamic and Acoustic Power in Infant Cry, Journal of Voice. Used on Crying baby. Checked 2026-11-02.
  145. Alarm frequency, Kidde. Used on Smoke alarm. Checked 2026-11-02.
  146. Directive 2003/10/EC (noise), Article 3: Exposure limit values and exposure action values, legislation.gov.uk (copy of EU Official Journal text). Used on How loud is too loud?. Checked 2026-11-02.
  147. Commission Decision 2009/490/EC on the safety requirements to be met by European standards for personal music players, Article 3, legislation.gov.uk (copy of EU Official Journal text). Used on Headphones and kids. Checked 2026-11-02.
  148. Commission Decision 2009/490/EC on the safety requirements to be met by European standards for personal music players, recitals, legislation.gov.uk (copy of EU Official Journal text). Used on Headphones and kids. Checked 2026-11-02.
  149. The Control of Noise at Work Regulations 2005, Regulation 4 (as made), legislation.gov.uk (The National Archives). Used on dB vs dBA vs dBC, How loud is too loud?, Fireworks, pets and kids. Checked 2026-11-02.
  150. Regulation (EU) No 540/2014, Annex VIII (Acoustic Vehicle Alerting Systems), legislation.gov.uk (UK National Archives). Used on Electric car (warning sound). Checked 2026-11-03.
  151. Regulation (EU) No 540/2014, Annex III: Limit values, legislation.gov.uk (UK National Archives). Used on Electric car (warning sound), Lorry (heavy truck). Checked 2026-11-03.
  152. Regulation (EU) No 540/2014, Annex II: Methods and instruments for measuring the noise made by motor vehicles, legislation.gov.uk (UK National Archives). Used on Electric car (warning sound), Lorry (heavy truck). Checked 2026-11-03.
  153. Commission Regulation (EU) No 666/2013, Annex I: Ecodesign requirements, legislation.gov.uk (UK-retained EU law). Used on Vacuum cleaner. Checked 2026-11-02.
  154. The Next NASA X-Plane: Born To Boom, Machine Design. Used on Sonic boom. Checked 2026-11-02.
  155. weightingFilter: Frequency-weighted filter (Audio Toolbox documentation), MathWorks. Used on dB vs dBA vs dBC. Checked 2026-11-02.
  156. MediaTrackConstraints: autoGainControl property, MDN Web Docs. Used on Phone decibel meters. Checked 2026-11-02.
  157. MediaTrackConstraints: noiseSuppression property, MDN Web Docs. Used on Phone decibel meters. Checked 2026-11-02.
  158. MediaTrackConstraints: echoCancellation property, MDN Web Docs. Used on Phone decibel meters. Checked 2026-11-02.
  159. [Acoustical parameters of toys], Medycyna Pracy. Used on Noisy toys. Checked 2026-11-02.
  160. Audio Lab | Microsoft: Inside B87, Microsoft. Used on Microsoft anechoic chamber, Air molecules (Brownian motion), Normal breathing, Rustling leaves, Elephant. Checked 2026-11-02.
  161. Impact of noise on hearing in the military, Military Medical Research (2015). Used on Aeroplane cabin, Fighter jet, Aircraft carrier flight deck, Helicopter. Checked 2026-11-03.
  162. Measurement and evaluation of the acoustic noise of a 3 Tesla MR scanner, Nagoya Journal of Medical Science. Used on MRI scanner. Checked 2026-11-02.
  163. NASA Dryden Fact Sheet: Sonic Booms, NASA. Used on Sonic boom. Checked 2026-11-02.
  164. Sound Suppression System, NASA (Wayback Machine copy). Used on Space Shuttle launch. Checked 2026-11-02.
  165. Measurement and Characterization of Space Shuttle Solid Rocket Motor Plume Acoustics, NASA Technical Reports Server. Used on Space Shuttle launch. Checked 2026-11-02.
  166. Simulations of X-59 Low-Booms Propagated Through Measured Atmospheric Profiles in Galveston, Texas, NASA Technical Reports Server. Used on Sonic boom. Checked 2026-11-02.
  167. New study reveals Starship's true sound levels; shows differences between SLS and Falcon 9, NASASpaceflight.com. Used on Saturn V launch. Checked 2026-11-02.
  168. Snapping shrimp make flashing bubbles, Nature (Lohse et al., 2001) via PubMed. Used on Snapping (pistol) shrimp. Checked 2026-11-02.
  169. The Sound So Loud That It Circled the Earth Four Times, Nautilus (Aatish Bhatia, 2014). Used on Krakatoa eruption, 1883, Loudest possible undistorted sound in air. Checked 2026-11-02.
  170. Noise Levels in Cinemas, New Zealand Acoustics, Vol. 15 No. 2 (Damian Ellerton, Marshall Day Acoustics). Used on Cinema. Checked 2026-11-02.
  171. A survey of owners' perceptions of fear of fireworks in a sample of dogs and cats in New Zealand (New Zealand Veterinary Journal 2010), New Zealand Veterinary Journal (abstract via Europe PMC API; PMID 21151214). Used on Fireworks, pets and kids. Checked 2026-11-02.
  172. Noise-Induced Hearing Loss, NIDCD / NIH. Used on Normal conversation, How loud is too loud?. Checked 2026-11-02.
  173. About Noise and Hearing Loss Prevention, NIOSH / CDC. Used on Vacuum cleaner, dB vs dBA vs dBC, How decibels add, How loud is too loud?, Concert earplugs. Checked 2026-11-02.
  174. Health Hazard Evaluation Report 2007-0068-3042: Louisiana Society for the Prevention of Cruelty to Animals, NIOSH / CDC. Used on Dog barking. Checked 2026-11-02.
  175. Sound Level Meter App, NIOSH / CDC. Used on Phone decibel meters. Checked 2026-11-02.
  176. Noise Evaluation of Elementary and High School Music Classes and Indoor Marching Band Rehearsals - Alabama (HETA 2011-0129-3160), NIOSH / CDC (2012). Used on Marching band. Checked 2026-11-02.
  177. Criteria for a Recommended Standard: Occupational Noise Exposure, Revised Criteria 1998 (DHHS (NIOSH) Publication No. 98-126), NIOSH / CDC (CDC Stacks). Used on dB vs dBA vs dBC, How decibels add, How loud is too loud?, Concert earplugs, NRR vs SNR, Fireworks, pets and kids. Checked 2026-11-02.
  178. Grounds for Change: Reducing Noise Exposure in Grounds Management Professionals - Part 1, NIOSH Science Blog, CDC (archived copy). Used on Chainsaw, Leaf blower, Petrol lawn mower, Wood chipper, Jackhammer. Checked 2026-11-03.
  179. Joint Interim Report: Bahamas Marine Mammal Stranding Event of 15-16 March 2000, NOAA / National Marine Fisheries Service and US Navy (2001). Used on Military sonar. Checked 2026-11-02.
  180. Hearing Conservation (archived 2009 copy, End of Term Web Archive), NOAA Southeast Fisheries Science Center. Used on Rustling leaves, Ticking watch, Birdsong. Checked 2026-11-02.
  181. Acoustic Conditions and Student Perceptions in a Québec Classroom: A Case Study, Noise & Health. Used on Classroom. Checked 2026-11-02.
  182. Integrated Effects of Environmental and Classroom Noise on Attention and Learning in School-age Children, Noise & Health. Used on Classroom. Checked 2026-11-02.
  183. Hand dryer noise in public restrooms exceeds 80 dBA at 10 ft (3 m), Noise & Health. Used on Hand dryer. Checked 2026-11-02.
  184. High sound pressure levels in Bavarian discotheques remain after introduction of voluntary agreements, Noise & Health (2008). Used on Nightclub. Checked 2026-11-02.
  185. Estimates of the auditory risk from outdoor impulse noise. I: Firecrackers, Noise & Health (2009). Used on Firecrackers. Checked 2026-11-02.
  186. Evaluation of the noise exposure of symphonic orchestra musicians, Noise & Health (2014). Used on Symphony orchestra. Checked 2026-11-02.
  187. Sound exposure during outdoor music festivals, Noise & Health (2016). Used on Music festival. Checked 2026-11-02.
  188. Music level preference and perceived exercise intensity in group spin classes, Noise & Health (2021). Used on Spin class. Checked 2026-11-02.
  189. Assessment of Noise Exposure and Risk of Hearing Loss for Young People in Amusement Arcades, Noise & Health (2024). Used on Amusement arcade. Checked 2026-11-02.
  190. Distortion-Product and Transient-Evoked Otoacoustic Emissions Before and After Noise Exposure During Drummer Rehearsals, Noise & Health (2025). Used on Drum kit. Checked 2026-11-02.
  191. Frequency-Weightings for Sound Level Measurements, NTi Audio (sound level meter manufacturer). Used on dB vs dBA vs dBC. Checked 2026-11-02.
  192. A silent hazard-noise in the veterinary sector: a scoping review, Occupational Medicine (2026), via PMC. Used on Dog barking. Checked 2026-11-02.
  193. Directive 2003/10/EC of the European Parliament and of the Council of 6 February 2003 (Official Journal L 42/38), Official Journal of the European Union (PDF via legislation.gov.uk). Used on dB vs dBA vs dBC, How loud is too loud?. Checked 2026-11-02.
  194. "The Quietest Place on Earth", Orfield Laboratories. Used on Orfield Labs anechoic chamber. Checked 2026-11-02.
  195. Automobile airbag impulse noise: otologic symptoms in six patients, Otolaryngology - Head and Neck Surgery (1998), PubMed abstract. Used on Airbag deployment. Checked 2026-11-03.
  196. Incidence of spontaneous hearing threshold shifts during modern concert performances, Otolaryngology - Head and Neck Surgery (2006). Used on Rock concert. Checked 2026-11-02.
  197. Children who say hand dryers 'hurt my ears' are correct: A real-world study examining the loudness of automated hand dryers in public places, Paediatrics & Child Health. Used on Noisy toys, Hand dryer. Checked 2026-11-02.
  198. Comparing Noise Production of Pediatric Dental Instrumentation Techniques, Pediatric Dentistry. Used on Dental drill. Checked 2026-11-02.
  199. Infant sleep machines and hazardous sound pressure levels, Pediatrics. Used on Infant sleep machine. Checked 2026-11-02.
  200. The roar of a rocket, Physics Today (Kent L. Gee). Used on Saturn V launch, Space Shuttle launch, SLS rocket launch (Artemis I). Checked 2026-11-02.
  201. Hearing Loss Secondary to Sound Exposure, Pipes|Drums (Dr Patrick L. Potter, MD, FRCPC). Used on Bagpipes. Checked 2026-11-02.
  202. Population, behavioural and physiological responses of an urban population of black swans to an intense annual noise event, PLoS ONE (2012). Used on Formula 1 Grand Prix. Checked 2026-11-03.
  203. Adapted to roar: functional morphology of tiger and lion vocal folds, PLoS ONE (Klemuk et al., 2011), via PMC. Used on Lion roar. Checked 2026-11-02.
  204. Visualizing Sound Emission of Elephant Vocalizations: Evidence for Two Rumble Production Types, PLoS ONE (Stoeger et al., 2012), via PMC. Used on Elephant. Checked 2026-11-02.
  205. So small, so loud: extremely high sound pressure level from a pygmy aquatic insect (Corixidae, Micronectinae), PLoS ONE (Sueur et al., 2011). Used on Water boatman. Checked 2026-11-02.
  206. So small, so loud: extremely high sound pressure level from a pygmy aquatic insect (Corixidae, Micronectinae), PLoS ONE (Sueur et al., 2011), via PubMed. Used on Water boatman. Checked 2026-11-02.
  207. Pyro Distraction PT4523A data sheet, PrimeTake (manufacturer). Used on Stun grenade (flash-bang). Checked 2026-11-03.
  208. Dentists' hearing and exposure to high speed turbine dental drill noise, Proceedings of the Finnish Dental Society. Used on Dental drill. Checked 2026-11-02.
  209. Intensity of snoring in patients with sleep-related breathing disorders, Psychiatry and Clinical Neurosciences. Used on Snoring. Checked 2026-11-02.
  210. Noise Sources and Their Effects, Purdue University, Department of Chemistry. Used on Garbage disposal, Normal breathing, Rustling leaves, Whisper, Ticking watch, Quiet library, Quiet rural area, Thunder, Birdsong, Crickets. Checked 2026-11-02.
  211. Measurement of acoustic noise during MR imaging: evaluation of six "worst-case" pulse sequences, Radiology. Used on MRI scanner. Checked 2026-11-02.
  212. Is your dishwasher quiet enough?, Reviewed (USA Today network). Used on Dishwasher. Checked 2026-11-02.
  213. Analysis of sound pressure levels emitted by children's toys, Revista Paulista de Pediatria. Used on Noisy toys. Checked 2026-11-02.
  214. The Eruption of Krakatoa, and Subsequent Phenomena (Report of the Krakatoa Committee of the Royal Society, 1888), Royal Society / Internet Archive. Used on Krakatoa eruption, 1883. Checked 2026-11-02.
  215. Sound attenuation in the ear of domestic chickens (Gallus gallus domesticus) as a result of beak opening, Royal Society Open Science (Claes et al., 2017), via PubMed. Used on Rooster crowing. Checked 2026-11-02.
  216. Fireworks campaign, RSPCA. Used on Fireworks, pets and kids. Checked 2026-11-02.
  217. Noise exposure during prehospital emergency physicians work on Mobile Emergency Care Units and Helicopter Emergency Medical Services, Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine (2017). Used on Ambulance siren, Helicopter. Checked 2026-11-03.
  218. What is a decibel? (Music Acoustics), School of Physics, UNSW Sydney. Used on dB vs dBA vs dBC, How decibels add. Checked 2026-11-02.
  219. Music acoustics FAQ: Does adding two identical sounds give an increase of 3 dB or 6dB?, School of Physics, UNSW Sydney. Used on How decibels add. Checked 2026-11-02.
  220. Atmospheric waves and global seismoacoustic observations of the January 2022 Hunga eruption, Tonga, Science (Matoza et al., 2022) via PubMed. Used on Krakatoa eruption, 1883. Checked 2026-11-02.
  221. How snapping shrimp snap: through cavitating bubbles, Science (Versluis et al., 2000) via PubMed. Used on Snapping (pistol) shrimp. Checked 2026-11-02.
  222. White bellbirds have the loudest known mating call of any bird, Science News. Used on White bellbird, Screaming piha. Checked 2026-11-02.
  223. Noisy Christmas toys could damage children's hearing (Deafness Research UK / UCL), ScienceDaily. Used on Toy cap gun. Checked 2026-11-02.
  224. Popping balloons can be as loud as a shotgun, ScienceDaily (University of Alberta release). Used on Balloon pop. Checked 2026-11-02.
  225. Lombard effect, intelligibility, ambient noise, and willingness to spend time and money in a restaurant amongst older adults, Scientific Reports. Used on Normal conversation, Busy restaurant. Checked 2026-11-02.
  226. Prevalence, comorbidity, and breed differences in canine anxiety in 13,700 Finnish pet dogs (Salonen et al., Scientific Reports 2020), Scientific Reports (via PMC). Used on Fireworks, pets and kids. Checked 2026-11-02.
  227. Fear expressions of dogs during New Year fireworks: a video analysis (Scientific Reports 2020), Scientific Reports (via PMC). Used on Fireworks, pets and kids. Checked 2026-11-02.
  228. A Hearing Loss Prevention Outreach Program for Farmers and Motorsports Enthusiasts, Seminars in Hearing (2017). Used on Motocross and monster truck show, Tractor pull. Checked 2026-11-03.
  229. Prevention of Noise-Induced Hearing Loss from Recreational Firearms, Seminars in Hearing (2017), open access via PMC. Used on Handgun, Rifle, Shotgun, Suppressed rifle, Starter pistol. Checked 2026-11-03.
  230. Snoring: a source of noise pollution and sleep apnea predictor, Sleep. Used on Snoring. Checked 2026-11-02.
  231. Vuvuzela - good for your team, bad for your ears, South African Medical Journal (2010). Used on Vuvuzela. Checked 2026-11-02.
  232. No, NASA's massive Saturn V rocket didn't melt concrete with sound or set fires a mile away, Space.com. Used on Saturn V launch. Checked 2026-11-02.
  233. Chrysler Once Built The World's Loudest Air-Raid Siren, And It's Powered By A Hemi V8, The Autopian. Used on Chrysler air raid siren. Checked 2026-11-03.
  234. Noise induced hearing loss in dance music disc jockeys and an examination of sound levels in nightclubs, The Journal of Laryngology & Otology (2004). Used on Nightclub. Checked 2026-11-02.
  235. Cycling exercise classes may be bad for your (hearing) health, The Laryngoscope (2017). Used on Spin class. Checked 2026-11-02.
  236. Noise Exposure on the London Underground, an Observational Study over a Decade, The Laryngoscope (Singh et al., 2020), abstract via Europe PMC. Used on London Underground. Checked 2026-11-03.
  237. Exploring the relationship between traffic, speed, and personal in-vehicle noise exposure during commutes, Transportation Research Interdisciplinary Perspectives (2026). Used on Inside a car. Checked 2026-11-03.
  238. Consumer-Grade Headphones for Children: Limited Effectiveness of "Level Limiters" When Used With Portable or Home Media Players (Trends in Hearing 2019), Trends in Hearing (via PMC). Used on Headphones and kids, Fireworks, pets and kids. Checked 2026-11-02.
  239. 29 CFR 1910.95 Occupational noise exposure (Code of Federal Regulations, 2024 edition), U.S. Government Publishing Office (govinfo.gov). Used on How decibels add, How loud is too loud?, NRR vs SNR, Fireworks, pets and kids. Checked 2026-11-02.
  240. Understanding Sound - Natural Sounds, U.S. National Park Service. Used on Threshold of hearing, Haleakalā crater, Rustling leaves, Whisper, Quiet rural area, Ocean waves, Thunder, Crickets, Fighter jet, Motorcycle, City street traffic. Checked 2026-11-02.
  241. Lower noise, vibration and dust alternatives for angle grinding - recent HSE research, UK Hearing Conservation Association (summary of HSE research). Used on Angle grinder. Checked 2026-11-03.
  242. Regulation No. 28: Uniform provisions for the approval of audible warning devices and of motor vehicles with regard to their audible signals (United Nations Treaty Series, Volume 854), United Nations. Used on Car horn. Checked 2026-11-03.
  243. Chapter 24: Loudest (University of Florida Book of Insect Records, archived copy), University of Florida, Department of Entomology and Nematology. Used on Crickets, Cicada. Checked 2026-11-02.
  244. Noise and Hearing Loss, fact sheet 51-001-0902, US Army Center for Health Promotion and Preventive Medicine (archived 2004). Used on Jackhammer, Shotgun, Artillery (howitzer). Checked 2026-11-03.
  245. Noise levels of common Army equipment: steady noise (Table A-1) and impulse noise (Table A-2), US Army hearing conservation programme, Fort Campbell (archived 2013). Used on Handgun, Rifle, Artillery (howitzer), Tank (moving). Checked 2026-11-03.
  246. 49 CFR § 229.129 - Locomotive horn., US Code of Federal Regulations (Legal Information Institute, Cornell). Used on Train horn. Checked 2026-11-03.
  247. 40 CFR § 205.152 - Noise emission standards., US Code of Federal Regulations (Legal Information Institute, Cornell). Used on Motorcycle. Checked 2026-11-03.
  248. 40 CFR § 205.52 - Vehicle noise emission standards., US Code of Federal Regulations (Legal Information Institute, Cornell). Used on Lorry (heavy truck). Checked 2026-11-03.
  249. 40 CFR § 205.54-1 - Low speed sound emission test procedures, US Code of Federal Regulations (Legal Information Institute, Cornell). Used on Lorry (heavy truck). Checked 2026-11-03.
  250. 36 CFR § 7.13 - Yellowstone National Park, US Code of Federal Regulations (Legal Information Institute, Cornell). Used on Snowmobile. Checked 2026-11-03.
  251. AC 36-3H Change 1: Estimated Airplane Noise Levels in A-Weighted Decibels, US Federal Aviation Administration. Used on Jet take-off, Jet coming in to land, Concorde. Checked 2026-11-03.
  252. AC 36-3G: Estimated Airplane Noise Levels in A-Weighted Decibels, US Federal Aviation Administration. Used on Jet take-off, Jet coming in to land, Concorde. Checked 2026-11-03.
  253. US8161883B1 - Flash-bang grenade with greater flash intensity, US patent (via Google Patents). Used on Stun grenade (flash-bang). Checked 2026-11-03.
  254. Vanderbilt audiologist measures sound of Music City's 'Loudest Voices', Vanderbilt University Medical Center News. Used on Cicada. Checked 2026-11-02.
  255. Determining Hearing Thresholds in Dogs Using the Staircase Method (Veterinary Sciences 2024), Veterinary Sciences (via PMC). Used on Fireworks, pets and kids. Checked 2026-11-02.
  256. Frequency Weightings for Sound and Vibration Perceived by Humans using Multi-Instrument, Virtins Technology (measurement software maker). Used on dB vs dBA vs dBC. Checked 2026-11-02.
  257. Media Capture and Streams (W3C Candidate Recommendation), W3C. Used on Phone decibel meters. Checked 2026-11-02.
  258. Noise exposure and hearing loss among tractor drivers in India, Work (2023), PubMed abstract. Used on Tractor. Checked 2026-11-03.
  259. Deafness and hearing loss: Safe listening, World Health Organization. Used on Headphones at full volume, Firecrackers, How loud is too loud?, Headphones and kids, Concert earplugs. Checked 2026-11-02.
  260. Safe listening devices and systems: a WHO-ITU standard, World Health Organization. Used on How loud is too loud?, Headphones and kids, Concert earplugs, Fireworks, pets and kids. Checked 2026-11-02.
  261. New WHO-ITU standard aims to prevent hearing loss among 1.1 billion young people, World Health Organization. Used on How loud is too loud?, Headphones and kids, Concert earplugs, Fireworks, pets and kids. Checked 2026-11-02.
  262. Make Listening Safe, World Health Organization. Used on How loud is too loud?, Headphones and kids, Concert earplugs. Checked 2026-11-02.
  263. WHO releases new standard to tackle rising threat of hearing loss, World Health Organization. Used on How loud is too loud?, Headphones and kids, Concert earplugs. Checked 2026-11-02.
  264. Deafness and hearing loss (fact sheet), World Health Organization. Used on How loud is too loud?, Headphones and kids, Concert earplugs. Checked 2026-11-02.
  265. WHO global standard for safe listening venues and events, World Health Organization (2022). Used on Rock concert, Drum kit. Checked 2026-11-02.
  266. Standards for safe listening devices: situation analysis (Make Listening Safe, WHO and ITU), World Health Organization / International Telecommunication Union. Used on Headphones and kids. Checked 2026-11-02.
  267. Do high sound pressure levels of crowing in roosters necessitate passive mechanisms for protection against self-vocalization?, Zoology (Claes et al., 2018), via PubMed. Used on Rooster crowing. Checked 2026-11-02.