Thread: Dont take hearing protection lightly

its not just a question of volume but also the waveshape and frequency of sound.
to give an example 120dB of piano is no where near as harmful as 120dB of violin as the piano produces an almost sine wave tone that accelerates and decelerates the eardrum smoothly, the violin has a very sharp attack on the wave and a slower decay causing the eardrum to accelerate then decelerate abruptly.
things like angle grinders will cause hearing loss in the vocal frequencies but you will probably still hear lows and highs reasonably well.
i spent years repairing tv's (old tube ones) with 40 plus running in the workshop, thats 20 years ago and my hearing from 15k to 16k is horrid as 15625Hz was line frequency and after a few months my brain switched off to it. yet i can hear very well below and above that frequency.