![]() In order to protect soldiers from hearing loss, the U.S. By comparison, noises from industrial settings were measured to have peak levels of 113 to 120 dB. As a result, near-field peak levels measured close to the muzzle of a weapon can range from 150 dB for handheld weapons and over 180 dB for heavy artillery. ![]() Unlike the continuous background noise often found in industrial environments, the impulse noise produced by weapons and firearms demonstrates a very high pressure level within a very short duration of time, typically around a few milliseconds. The damage to the auditory system can vary depending on the type of noise exposure. Noise-induced hearing loss (NIHL) typically occurs when the auditory system experiences an elevation of hearing thresholds due to exposure to high-level noise, a phenomenon known as a temporary threshold shift (TTS), and does not return to normal threshold levels.
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