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  • Measuring sound...with a phone?

    July 12, 2018
    Sound propagates as pressure fluctuates in fluids; measuring sound means converting these fluctuations into electrical signals with a transducer. A sound level meter—a pressure transducer attached to a voltmeter—has often been used to record noise levels around a heat exchanger experiencing acoustic vibration. The human ear responds to pressure fluctuations over...
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