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Recreational Firearm Noise Exposure @ 12 PM Eastern

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1.  Large bore rifles are capable of generating sound pressure levels in the range of: 120 dB 135 dB 165 dB 200 dB

2.  The impulse noise peak generated by firearms in a non-reverberant acoustical environment is approximately ______ in duration. one microseconds two milliseconds 200 microseconds one second

3.  Hearing loss secondary to excessive firearm noise is typically: low frequency and conductive high frequency and sensorineural high frequency and conductive low frequency and sensorineural

4.  Installing a muzzle brake on the barrel of a firearm will: increase recoil and sound pressure level decrease recoil and increase sound pressure level decrease recoil and sound pressure level none of the above

5.  Recent studies of recreational firearm users have consistently found: 80% of shooters do not wear hearing protective devices when hunting most shooters wear electronic HPDs for target practice and hunting 70% of shooters do not wear HPDs during target practice the majority of shooters use earmuffs when hunting

6.  A recent study of waterfowl hunters found the ___ gauge shotgun was the most commonly used firearm for hunting. 20 16 12 10

7.  The most frequently reported reason shooters do not wear HPDs while hunting is: HPDs cost too much HPDs feel unnatural they cannot hear approaching game they forget to bring them

8.  Several studies have found approximately ____% of recreational firearm users report experiencing tinnitus or an increase in tinnitus after shooting. 50 - 65 18 95 5

9.  Electronic HPDs employ a amplifier to increase lower-level sound and a ____ to limit output. expansion peak clipper anti-noise circuit digital processor

10.  Non-linear HPDs: provide progressively more attenuation as the sound gets louder provide 30 dB of low frequency attenuation in quiet usually have a noise reduction rating of 55 dB none of the above