What are Some Acoustic Weapons?

When people are unprotected, they will feel uncomfortable or damage the hearing system in an environment with audible sound above 120 decibels. When the volume rises above 150 decibels, people in this environment will experience rupture of the tympanic membrane and bleeding. , Loss of hearing, and even mental disorders. After research, it was found that infrasound waves are not easy to decay and are not easily absorbed by water and air. The wavelength of infrasound waves is often very long, so they can diffract around obstacles like electromagnetic waves. The killing range is large, but it is difficult to control the direction. High-power infrasound waves can cause strong resonance in the internal organs, make people feel nausea, headache, difficulty breathing, and even cause blood vessel rupture and internal organ damage. The effect of high-power ultrasonic waves is similar to that of infrasound waves, but the transmission direction is better than that of infrasound waves. It travels along a straight line, is easy to control, has a strong ability to penetrate straight lines, but has a small killing range. Generally, sonic weapons do not use sound waves in the human audible frequency range, because infrasound waves and ultrasonic waves are highly concealed.

Sonic weapon

When people are unprotected, they will feel uncomfortable or damage the hearing system in an environment with audible sounds above 120 decibels. When the volume rises above 150 decibels, people in this environment will appear.

In 2004, the New York Police

LRAD (short for long range acoustic device), which means Yin Rui Da long-range directional acoustic wave equipment, police or military customers often emit the maximum volume in crisis, using it as a sonic weapon or sonic disperser. It was developed in October 2000 after the USS Cole was attacked by a small boat. Although the USS Cole had sufficient firepower to prevent attacks, the sailors on the USS Cole had no way of knowing whether they were civilians or terrorists on the approaching opposing ship. Directional sound waves help military and commercial security personnel to clarify each other's intent to approach each other, creating a large security area, thereby allowing sufficient reaction time and reaction distance, and making life and death choices. Directional sound waves can be broadcast at distances of up to 3,500 meters and the device weighs from a minimum of 6.8 kg to a maximum of 150 kg. Within this range, high-definition warnings, instructions and key messages can be emitted. By transmitting multilingual voice commands and warning sounds, directional acoustic wave systems can help military, public security law enforcement, and security personnel to create a larger safe area, determine the intent of approaching people, and help resolve the two peacefully in the event of uncertainty. Side conflicts to protect the lives of people on both sides of long-range directional acoustic wave equipment. Up to now, LRAD has been widely used in the fields of navy, sea surveillance, fishery administration, public security, armed police, air force, army, militia, military and civil airport bird-repellent, oil and gas companies, Ministry of Civil Affairs disaster relief, border control and other fields.