noise & Society
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17 terms
Terms | Definitions |
|---|---|
 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 |
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