The sound meter is a handheld sound measuring instrument with a microphone. The sound meter works in correspondence to the change in air pressure which is caused by the sound waves. The changing air pressure results in the movement of the diaphragm of the microphone which makes the sound meter measure the acoustic signal.
Cold forging is a manufacturing practice in which shaping of work piece is done by applying certain forces at room temperature. If the same process is done at higher temperature then it is known by hot ..
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