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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. It has been used as a method of crowd control , which has caused permanent hearing damage , having an extremely high decibel capacity (up to 160 dB measured at one ...
The device works by emitting an ultra-high frequency blast (around 19–20 kHz) that teenagers or people under approximately 20 are susceptible to and find uncomfortable. Age-related hearing loss apparently prevents the ultra-high pitch sound from causing a nuisance to those in their late twenties and above, though this is wholly dependent on a ...
A commonly reported method of blowing a person from a gun is to tie them in front of the muzzle of the gun and then have them shot. Loading the cannon with an actual cannonball is on occasion reported; but, more commonly, the use of blank cartridge or grapeshot is attested.
The audible sound of a gun discharging, also known as the muzzle report or gunfire, may have two sources: the muzzle blast itself, which manifests as a loud and brief "pop" or "bang", and any sonic boom produced by a transonic or supersonic projectile, which manifest as a sharp whip-like crack that persists a bit longer.
These cannon could fire heavy stone balls a mile, and the sound of their blast could reportedly be heard from a distance of 10 miles (16 km). [68] Shkodëran historian Marin Barleti discusses Turkish bombards at length in his book De obsidione Scodrensi (1504), describing the 1478–79 siege of Shkodra in which eleven bombards and two mortars ...
The history of cannon spans several hundred years from the 12th century to modern ... and the sound of their blast could reportedly be heard from a distance of 10 ...
A directed-energy weapon (DEW) is a ranged weapon that damages its target with highly focused energy without a solid projectile, including lasers, microwaves, particle beams, and sound beams. Potential applications of this technology include weapons that target personnel, missiles, vehicles, and optical devices. [1] [2]
Signal processing wise, sound ranging is moving away from processing muzzle blast noise signals because of several trends. One trend is longer-range artillery. Muzzle blast noise may attenuate down to a level no longer detectable at the sensor post, but even if it does, the speed of the sound being slow and modern artillery moving on after ...