Threshold of Pain - Hearing

Threshold of Pain - Hearing - These hair cells are...

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Click to edit Master subtitle style 2/25/11 By: Mourice McDuffie Hearing: Threshold of Pain
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2/25/11 I have a HUGE interest in things like this: http://www.youtube.com/watch?v=YYiQRa5rYMw Why I Chose this Topic
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2/25/11 Defined as the point where one starts to feel pain In hearing, it’s determined by the volume, or Sound Pressure Level of which a sound is heard. Measured in DECIBALS (DB’s) The threshold of pain is proven to be reached at/around a measure of 137.5 DB. This threshold varies slightly for different frequencies/pitches. What is the Threshold of Pain?
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2/25/11 Where loud music is present: Clubs Car audio competitions Church Headphones Where is this Achieved?
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2/25/11 What happens when the Threshold of pain is reached? The Sound Pressure Level (SPL) of the sound exceeds what’s tolerable for the listener. Inner hair cells in the cochlea respond to frequent loud noise exposure by bending.
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Unformatted text preview: These hair cells are responsible for nerve transmission of auditory impulses to the brain. Upon loud noise exposure, these hair cells are stained or destroyed. Connecting with Class 2/25/11 The damaged hair cells occasionally transmit abnormal signals which the brain interprets as noise. The outcome is some degree of hearing loss and tinnitus(ringing of the ears). Tinnitus is an indicator that lets you know that youve reach the threshold of pain for hearing. Connecting with Class 2/25/11 Be aware of noises that exceed 90 DBs A train whistle about 500 ft away measures at about 90 DBs Wear ear plugs when car audio competing Stay away from crazed church drummers Try not to be exposed to loud noises until the ringing has stopped Solutions 2/25/11 Questions?...
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This note was uploaded on 02/24/2011 for the course PSYC 460 taught by Professor Lawrence during the Spring '10 term at South Carolina.

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Threshold of Pain - Hearing - These hair cells are...

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