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DTIC ADP014113: Low Frequency Noise: A Major Risk Factor in Military Operation

Noise is a major factor in many military environments. Usually the concern is with the higher frequency bands (> 500 Hz) that cause hearing damage or interfere with speech. Protection against noise is thus focused on these higher frequencies, while the bands of lower frequencies (< 500 Hz) are neglected, and non-audible bands, infrasound (<20Hz) are ignored. In reality, long term exposure to low frequency noise (<500 Hz, including infrasound) (LFN) can be quite detrimental to one's health. LFN-Induced Pathology. The disorders associated with occupational exposure to LFN have been described for aeronautical technicians and pilots.

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