The Chinese Navy, especially the convoys, has been equipped with directional acoustic weapons, which are domestic products and have been displayed at defense exhibitions.
Features:
1. Extremely strong directionality: directional acoustic wave equipment to control the direction of sound emission in ± 15 ° or so, like a flashlight to launch light beams, directional acoustic waves emitted by the acoustic beams also have a strong directionality, so the noise will not be because of the impact of the surrounding environment;
? 2. Extremely long transmission distance: the sound transmission distance of traditional speakers within 50 meters, directional acoustic wave transmitter transmission distance up to nine kilometers (such as LRAD 2000X directional acoustic wave). Directional acoustic wave used for public security counter-terrorism riot control, the general transmission distance of more than 3,000 meters, to meet the long-distance communication, broadcasting, shouting between ships, airborne alarms and other purposes;
? 3. High sound quality and clarity: Directional sound waves emit crystal clear sound quality, clear sound, very high intensity, high recognition;
4. Adjustable beam width: The sound beam is generally adjustable between ± 7.5 ° to ± 15 °;? 5. Adjustable volume: Directional sound waves on the MP3 controller can be adjusted at any time to launch the volume, but also through the remote computer, timely adjustment of the launch volume, which helps to realize the role of communication / alert / repellent, respectively.
? May 10 issue of the "PLA Daily" published entitled "Gulf of Aden, the reporter experience escort "eighteen weapons" report, the first exposure that the Chinese Navy's fifth convoy escort ships, there is a mysterious sonic weapons --- "Golden Voice".
The "Golden Voice" is an effective deterrent to Somali pirates.
Operation mode is similar to the "sound into the secret"
Reports say, "golden voice" is the scientific name of the "acoustic enemy device", which looks like a sunflower, by the "mouth" (the mouth) of the "enemy" (the mouth of the enemy). "mouth" (a directional sound transmitter) and "brain" (a console).
Under the control of the escorting officers and men, the "golden voice" can flexibly rotate and adjust the angle, sending sound shock waves within a range of several hundred meters. Interestingly, other officers and soldiers on board the ship could hardly hear it, and the harsh and powerful sound turned into soft music when the operators put on protective ear muffs.
While the PLA Daily did not disclose more technical details, similar equipment from abroad and open literature show that such weapons usually emit high-frequency sound waves of more than 145 decibels, which are even harsher than the noise of jet engines and are sufficient to subdue armed elements.
In actual use, the operator can first warn by shouting, and if that has no effect, the device can be aimed at a target within a 15- to 30-degree angle, focusing on applying high-decibel noise to force the object to cooperate.
Unlike a megaphone that vibrates with a thin film to produce sound, sonic weapons usually use a semiconductor as the transmitter, which can produce an extremely narrow beam of sound like a spotlight that can only be heard by a specific recipient, much like the "sound transmission" in martial arts novels.
The highly directional sound sounds like it's coming from in front of the target, when in fact it's probably coming from hundreds of meters away.
The damage caused by sonic weapons depends on its energy and the distance to the target, which can make people feel like they are being hit hard, or give them a headache, shock or even suffocate.
It is because the size of the power can be precisely controlled, acoustic weapons can not only deal with emergencies against all kinds of dangerous elements, in the ocean convoy operations, can also be used to drive away and deter desperate pirates, but also do not cause harm to the daily operation of the fishermen.