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- 21:57, 30 November 2022 Nikolas talk contribs created page 115. Physical hazards: disorders caused by noise and vibration and their prevention (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...") Tag: Visual edit