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 …