PSYCH 2MP3 Chapter Notes - Chapter 7: Permissible Exposure Limit, Hair Cell
10 Mar 2020
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Document Summary
The greater the amplitude, the louder the sound will be heard. Perceived loudness of sound is based on its intensity. Human systems allows people to discriminate loudness differences of 1db for frequencies between 200-4000 hz: bats, dogs, etc. have more sensitive systems. Many countries have regulations for noise exposure in the workplace. In us: occupational safety and health administration (osha: says a permissible exposure limit (pel) of nore more tan 90 db over an 8 hour period in working environments. Unsurprising that incidence of hearing loss greater among musicians vs. nonmusicians. Brief exposure to very loud music can also lead to permanent damage. Mihl often found at around 4000 hz or 6000 hz. Research shows risks involved in using portable listening devices (plds) like mp3 players: 1/3 college students reported listening to ipod at 100% listening level. Pld users at greater risk for developing irreversible hearing loss. Most forms of nihl are permanent (irreparable damage to hair cells)
