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17 terms

noise & Society

STUDY
PLAY
acoustic trauma
the effect of a single exposure to a transient, high-intensity sound or it is generically used to describe the effect of excessive acoustic exposure
sensorineural hearing loss
loss due to outer or inner hair cell damage to the cochlea
noise-induced hearing loss
2nd most common cause of sensorineural hearing loss
Noise-Induced Hearing Loss
when excessive sound produces a threshold shift
temporary Threshold Shift
sensitivity of sound has gotten poorer for a short period of time
Permanent Threshold shift
Can occur from a single exposure when there are excessive pressure waves/gradually with repeated exposure
Permanent Threshold shift
hearing never goes back
Permanent Threshold shift
hair cells are too exhausted to replenish themselves, die off
Outer hair cell
higher frequency
Outer hair cell loss
can be due to metabolic changes and cell exhaustion. Affected first
Occupational Safety and Health Act
establishes guidelines to protect workers OSHA
160 dB
ruptured eardrum
125 dB
pain/discomfort
90 dB
(8-hr average) permanent hearing loss in approx. 25% of repeatedly exposed workers
85 dB
(8-hr average) permanent hearing loss in approx. 8% of repeatedly exposed workers
75-84 dB
(8-hr average) minor hearing loss may develop in repeatedly exposed workers with sensitive hearing
tinnitus
medical name for ringing in ears