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NPSF™ -- Are you trying to understand how a 30 dB hearing protector can protect your hearing against the 150 dB sound of a gunshot?

Answer:

Excellent question! At first glance, it would appear that you will still be exposed to 120 dB of noise, even with a 30 dB ear plug properly inserted (150-30=120), and because 120 dB is far above the 85 dB beginning threshold of NIHL (noise induced hearing loss,) it would seem that NIHL from shooting is unavoidable, and yet, shooters routinely are undamaged by their shooting experiences. What is going on here?

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