Nikolas
Created page with "* Disorders caused by noise ** Humans hear from 20 – 20 000 Hz ** Normal conversation is 60 dB ** Chronic exposure > 85 dB may cause hearing loss *** Higher noise causes hearing loss faster *** High frequency sounds are more damaging than low frequency sounds ** The phon scale *** For the human ear and brain, not only the sound pressure level (the decibel) but also the frequency matters. *** Unlike the normal decibel scale, the phon scale is standardized to one frequen..."