Other than heating element (ceramic), ionic, power (watts) and airflow (m3/ hour) and weigh, you may pick your first hair dryer for their calmness and here are the most quiet hair dryers according to their noise level.
Ion Whisper Quiet Lite Ionic – Ceramic Hair Dryer
Ion Whisper Quiet as its name indicates, this hair dryer is for those who is quite sensitive hearing
Dyson supersonic hair dryer
Either using noise level app on phone or sound meter we were able to get 79 decibels at a distance of 15 cm.
MHU Professional Salon Grade
Most professional hair dryers are quieter than average dryers you could find on the market, but this MHU hair dryer’s loudness level is somewhat comparable to professional tools.
What is a decibel (“dB”)?
A decibel (dB) is a unit of measurement of sound intensity. The higher the dB is, the more you feel it noisy. The dB is zero when the sound level is equal to the reference level, since dB calculated = log(sound level/reference level) = log(1) = 0
The dB can get the negative values for example -2 when the sound level is lower than the reference level 100 times. (dB = log(1/100) = -2)
If you are exposed to noise level over 85dB for a long period of time you may end up in hearing impair.
How to measure the noise level of hair dryer
Most commercial Digital Sound Level Meter (range 30 – 130dB) can meause the noise from hair dryer. The meter is placed in the same distance (6 inches for example) to the hair dryer as it is closed to your ears while performing blow-drying. The noise level depends on the distance between the sound meter and the source of sound.
You can also measure the noise level by App (iOS, Android) but this is less accurate than using noise level meter.
For some people who is sensitive to the sound, the noise level matters
Some hair dryers noise level when operated can go over 90 dB. Typically from 85dB to 95dB. Human’s ear are in comfort zone with sound, whose noise level is less than 85dB.
If you in a closed room and use hair dryer quite often, hearing those noises may be stressful, it’s better to pick quieter products.
The noise level at its peak when the hair dryer is set on its highest setting
For your references here are other models and their noise level
|GHD Air Dryer||103dB|