How loud is a hand dryer?
High-speed hand dryers can be extremely loud: a 2020 study of 44 public dryers recorded peaks up to 121 dBA at children's ear height, and Xlerator models exceeded 100 dBA whenever hands were in the airstream. Average readings in a 2015 study were 87 dBA at 2.5 ft and still 82 dBA at 10 ft.
- Level
- 80–121 dBA maxA-weighted maximum sound level
- Daily limit
- 7 s a dayNIOSH, at the loud end
- Versus conversation
- 6,310× energyabout 13.9× as loud
What the numbers mean
How it was measured. High-speed hand dryers in public washrooms. Peak readings at 30 and 45 cm from the wall at child and adult ear heights, with and without hands in the airflow (Keegan, 2020); average readings at 2.5 ft, 5 ft and 10 ft (Noise & Health, 2015); ear-level LAeq while drying (American Journal of Otolaryngology, 2020).
Nora Keegan's 2020 study in Paediatrics & Child Health measured 44 dryers in public washrooms at heights matching a 3-year-old, the author, and adult women and men, and at 30 and 45 cm from the wall. All Xlerator, Blast, Dyson Airblade and Airblade V units exceeded 100 dBA with hands in the airflow, and the single loudest reading was 121.1 dBA from a Dyson Airblade V. Many dryers were louder at children's ear heights, and many were far louder than their makers' stated 70 to 85 dB ratings.
A 2015 Noise & Health study measured dryers on a university campus at 2.5, 5 and 10 ft. Mean levels were 87 dBA at 2.5 ft, 84 dBA at 5 ft and 82 dBA at 10 ft, falling much less than the inverse-square law predicts because tiled washrooms reverberate. A 2020 study in the American Journal of Otolaryngology measured an average LAeq of 90.46 dBA at ear level while drying wet hands.
Exposure is short (dryer run times of 14 to 45 seconds in that study), which is why the 2020 otolaryngology study found dryers did not exceed federal workplace dose limits. The concern is the peak level at a child's ear.
How long is safe?
NIOSH recommends no more than 7 s a day at 121 dBA (no limit at the quiet end, 80). OSHA's legal limit is 6 min 32 s. This is a maximum, so a time limit based on it is a worst case.
| Level | NIOSH limit (85 dBA, 3 dB rule) | OSHA limit (90 dBA, 5 dB rule) | UK/EU 80 dB(A) action value reached after | UK/EU 85 dB(A) action value reached after |
|---|---|---|---|---|
| 80 dBA | No limit | No limit | Not reached in 24 h | Not reached in 24 h |
| 121 dBA | 7 s | 6 min 32 s | 2 s | 7 s |
Times are for a whole day’s exposure, with the rest of the day quiet. The workplace limits were written for adults at work, not for children. Work out a mixed day with the noise dose calculator.
Children
Children's ears are often right at the dryer's outlet. Let children dry their hands on paper towels, or stand well back while an adult uses the dryer; many children cover their ears for good reason.
Protecting your hearing
Hold your hands further from the outlet, step back from the wall, or use paper towels. For children, use towels or have them wait outside the washroom.
Earplug and earmuff ratings (NRR in the US, SNR in the UK and EU) are lab figures; real-world protection is usually lower. How to read the ratings.
Compared with sounds nearby
Using midpoints of each range. Energy multiplies by 10 every 10 dB; perceived loudness roughly doubles (why).
- Trumpet (86–108 dBA): this has about 2.2× its sound energy and sounds about 1.3× as loud.
- Headphones at full volume (80–115 dBA): this has about 2× its sound energy and sounds about 1.2× as loud.
- NASCAR race (96.5–109 dBA): it has about 1.7× the sound energy of this and sounds about 1.2× as loud.
- Train horn (96–110 dBA): it has about 1.8× the sound energy of this and sounds about 1.2× as loud.
- Normal conversation (55–70 dBA): this has about 6,310× its energy and sounds about 13.9× as loud.
Questions
Are hand dryers bad for children's ears?
Some reach well over 100 dBA at children's ear height, with a highest reading of 121 dBA; Canada does not allow toys with peaks above 100 dBA.
Why are hand dryers louder than advertised?
Manufacturers measure in controlled labs; real tiled washrooms reflect sound, and hands in the airflow add noise.
Sources
- 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. Supports: dB_high: 121 dBA peak.
The loudest reading (121.1 dBA) was with the Dyson Airblade V
Checked 2026-11-02. - 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. Supports: >100 dBA with hands in airflow.
Xlerator units performed the loudest, with all being louder than 100 dBA at all measurements whenever hands were in the airstream.
Checked 2026-11-02. - Hand dryer noise in public restrooms exceeds 80 dBA at 10 ft (3 m), Noise & Health. Supports: 87, 84, 82 dBA by distance.
found to be 87 dBA at 2.5 ft (from the dryer), 84 dBA at 5 ft away, and 82 dBA at 10 ft away
Checked 2026-11-02. - Hand dryer noise in public restrooms exceeds 80 dBA at 10 ft (3 m), Noise & Health. Supports: dB_low: 80 dBA.
The most intense sound recorded across all the trials was 91 dBA, and the least intense was 80 dBA.
Checked 2026-11-02. - Too loud? Do powered hand dryers violate federal noise exposure standards?, American Journal of Otolaryngology. Supports: LAeq 90.46 dBA at ear level.
Average LAeq (dBA), average maximum level (dBA), and average TWA (dBA) were 90.46 ± 5.32, 94.86 ± 5.73, 59.90 ± 6.80, respectively.
Checked 2026-11-02.
This page is general information, not medical advice. If you have ringing in your ears, muffled hearing or any change in your hearing, see an audiologist or your doctor.