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Acoustic Trauma from Recreational Noise Exposures

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1.  What is the minimum sound level necessary to induce acoustic trauma? 140 dB SPL 85 dB SPL 132 dB SPL 120 dB SPL

2.  What is the mechanism of cochlear damage from a blast overpressure? Force exceeds the elastic limit of the basilar membrane Force exceeds the elastic limit of the tympanic membrane Metabolic overload of the outer hair cells Cochlear blebs

3.  What is the mechanism of cochlear damage from long term moderate sound exposure between 78-132 dBA? Force exceeds the elastic limit of the basilar membrane Metabolic overload of the outer hair cells Middle-ear effusion Palatal myoclonus

4.  What is the most common cause of recreational acoustic trauma? Headphones NASCAR races Metal stamping Unprotected firearms exposure

5.  What is the maximum instantaneous peak sound level that a CD Player with earbud earphones could hit, according to Fligor and Cox (2004)? 136 dB SPL 185 dB SPL 85 dB SPL 102 dB SPL

6.  What is the maximum instantaneous peak sound level that a Creative Zen MP3 Player with iPod earbud earphones could hit, according to Portnuff et al (2011)? 140 dB SPL 126.9 dB SPL 185 dB SPL 102 dB SPL

7.  For a person sitting in the front row of a NASCAR race, what is their unprotected sound exposure from one race? 100% 1000% 64% 6400%

8.  What prescription medication is currently used in an attempt to treat acoustic trauma? Prednisone (oral or intratympanic) Tylenol Aminoglycoside antibiotics Cisplatinum chemotherapy

9.  Which novel compound might reduce the severity of permanent threshold shift from acoustic trauma? Prednisone (oral or intratympanic) Tylenol Aminoglycoside antibiotics D-methionine

10.  What is an example of why hunters will avoid using hearing protection? Loss of situational awareness Need somewhere to keep ammo, so why not the ear canal? Hearing protection costs more than the firearm Report of firearm is not capable of causing permanent hearing loss