New 7 Range Sound Level Audio Noise Meter Decibel DB New with Analog Display Measurment DB This is a Brand New Sound Level Pressure Meter which is useful for measuring sound intensity, determining speaker efficency or developing quick frequency response plots for loudspeakers. Power is supplied by a 9-volt battery, so the meter is completely portable To create quick frequency response plots, use an Audio Test CD and read the sound pressure directly from the meter. You can search for a free Audio Test CD on the Internet
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