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Two people wearing behind-the-neck earmuffs. Thermal earmuffs are worn for protection from the cold. Because the ears extend from the sides of the head to gather sound waves, they have a high skin surface-area-to-volume ratio, and very little muscle tissue, causing them to be one of the first body parts to become uncomfortably cold as temperatures drop.
An NYPD LRAD on top of a police humvee An LRAD operator wearing hearing protection LRAD on a navy ship. A long-range acoustic device (LRAD), acoustic hailing device (AHD) or sound cannon is a specialized loudspeaker that produces sound at high power for communicating at a distance.
In marketing, "military grade" is meant to symbolize and evoke higher-than-usual levels of toughness, durability, efficiency, and quality, as well as the implication that the product was tested and "approved" by some (non-existent) overseeing body or is regularly used and trusted by militaries—even if none of those are true.
The army deafness [nb 1] claims were a series of personal injury claims taken from 1992 to 2002 against the Irish Department of Defence by members of the Irish Defence Forces for noise-induced hearing loss resulting from exposure to loud noise during military operations and training.
Ear protection may pertain to protecting the ear from cold, intrusion by water or debris, or noise. It may refer to: Hearing protection device; Earplug; Earmuffs
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