Military Helmet (Wear Array)
In very hostile environments such as battlefields, effective communication between soldiers have always been a major problem. Battlefields noises such as explosions and gunshots makes communications between soldiers very difficult. In order to communicate, soldiers usually need to shout to make their instructions heard. Furthermore, this is not 100% effective as the noise in the battlefields are sometimes so loud that even shouting is of no use.
In BITwave, we have developed a wireless headset solution that enables soldiers to communicate effectively in battlefields. The solution is embedded within the helmet. The soldiers need only put on an additional headset and they are ready to communicate with each other within the communications net. With our leading edge array and noise suppression technology, all environmental noise is suppressed and only crystal clear speech is transmitted to other soldiers within the communications net.
Sniper Detection (Direction Finding)
When under enemy fire, especially sniper attacks or assassination, the enemy is always hidden and most of time undetectable. Police or military forces under these attacks, usually suffer heavy casualties.
One way to reduce and limit the amount of losses and casualties would be to essentially determine the approximate origin of the source of the projectile, the entire direction of the trajectory of a projectile, the miss-distance of that projectile and the approximate caliber or mass of that projectile when the first round is fired. All this information would allow the police or military forces to be able to react to the situation and detect and capture the enemy immediately.
In BITwave, we have developed a compact, low cost and highly accurate acoustic sensor array sniper detection and localization system. It uses observations of the shock wave from supersonic bullets to estimate the bullet trajectory and caliber. In addition muzzle blast observations from a firearm is used to estimate the exact sniper bearing. This sniper direction finding system consists of 4 or 5 acoustic sensors mounted on top of soldier's helmet. The whole system size is small and light weight (less than 100g) and is the world smallest soldier wearable sniper acoustic direction finding system.
Low Flying Object Detection (Direction Finding)
In modern battlefield environments, hostile helicopters are big threats to the ground troops. It has shown that traditional Radars are not good at detecting and locating distant low-hovering helicopters because the very strong ground clutters, severely multi-path effects, as well as intended jammers, always make the detection of desired targets very difficult or almost impossible even with advanced modern signal processing techniques. Laser systems are not useful either, because of their short detection range and sensibilities to weather conditions. Worse of all, active-sensing systems, such as Radars and Ladars, are expensive and vulnerable in modern battlefields.
Obviously, it is of a great value to detect and locate remote low-flying helicopters with passive-sensing systems, one of which are microphone array systems that exploits acoustic signals emitted by helicopters.
In BITwave, we have developed a helicopter detection system using an array of high performance microphones armed with advanced beamforming and other spatial filtering techniques to determine the direction of a helicopter under all-weather conditions. This system is promising and would be very useful in modern military or civil defense practices.
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