Laser rays are beams of rays moving in a straight line. So it is more powerful than ordinary rays. Scientists have also created a 'long range acoustic device', a device for sending sound waves far into a straight line in a beam.
From the point at which any sound is produced, circular waves propagate around and dim as they move. The acoustic device produces sound and throws its waves in a straight line in the shape of each other. This instrument sounds many times louder than our loud speaker. And not dim for long distances. Would be surprised to know. But this tool is useful for rescuing pirates at sea and terrorists hiding in remote jungles.
A person's ear can withstand a maximum of 3 decibels, causing loud noise to damage the ear and brain. Acoustic devices can send louder than 5 decibels over long distances. This noise is unbearable to terrorists hiding in the jungle. There is no way to avoid it and he escapes.
Acoustic devices consist of hundreds of strings of piezo electric metal shaking together. A loud noise makes a loud noise as the electricity flows through.
The city is known for its use of water fountains and teargas to disperse crowds during storms. Now the use of voice will also be possible.
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