Noise can also be a weapon :long range acoustic device
Laser rays are a beam of rays moving in a straight line. That is more powerful than ordinary rays. Scientists have developed a long-range acoustic device that can also send sound waves across a beam in a straight line. From the point at which any sound is produced it is spread all around by circular waves and slows down as it goes away. The acoustic device produces sound and throws its waves in the same direction in a straight line in the shape of each other. This device makes sound many times louder than our loudspeaker. And does not slow down over long distances. Would be surprised to know. But this tool is useful to repel pirates at sea and terrorists hiding in inaccessible forests. The human ear can tolerate noise up to a maximum of 120 decibels, so loud noise can damage the ears and brain. The acoustic device can send a sound greater than 150 decibels over long distances. This sound is unbearable to the ...