Audio Acoustics

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The sound leading to victory.

The role of hearing, as one of the five sense organs, plays an important role in our lives. By speech, we communicate, with sound, we get information about the world. From the point of view of physics, sound is a mechanical flux that spreads in the ulna: air, water, solid body, etc. Those frequencies that hear human ears are a fairly small interval between 16 Hz and 20 kHz. Sounds that we don't hear may also have different effects on us, such as low-frequency sound fluctuation between 5 and 8 Hz may cause a sense of fear, an infrasound at 110-130 dB (0 dB is the threshold of hearing) negatively affects the organs of the ventricular tract and sound at low frequencies (from 5 to 200 Hz) For example, with a charge explosion of 1 kg of trotile of pain in the ears occurs at a distance of up to 200 m, the sound level of more than 185 dB causes a break in the drums, the impact wave of about 200 dB results in a lung fracture and, at about 210 dB, a fatality occurs.

High and ultra-high frequencies are not lagged by exposure: sound from 5 kHz to 30 kHz can cause organism tissue overheating up to death, tissue burn and dehydration. Bubbles and microruptures of tissue may be formed at higher frequencies or short impulses.

Today, low frequency audible radiation is used to disperse mass demonstrations. There's a car out of the street with a low sound frequency wave coming out of the dynamics. She's the reason that demonstrators in panic are running away, where. High frequency sounds are also used to disperse demonstrations.

Acoustic weapons have long moved from the fantasy world to life: in November 2005, the acoustic gun helped the crew of the cruise ship Seabourn Spirit to reflect the attack of sea pirates on the coast of Somalia. The pirates fired on a ship from machine guns and grenade launchers, and then tried to take it to the abordage. Confidenced in their superiority, marine fighters demanded that the scrubbing be down, but in a few minutes, they had to drop their machine guns and grenade launchers, squeezing their ears out of pain... Seabourn Spirit was equipped with a LRAD- Long Range Acoustic Device system (a long-range silencing device, 150 dB at 2100-3100 Hz.). After the device was activated, pirates escaped.