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Sound pressure meter

Sound pressure meter
The design, consisting of an electric microphone, amplifier, and moving-coil meter, arranges for the meter to give a reading that is linearly proportional to the sound pressure. Sound pressure merers usually bave a logarithmic scale, but this would make the design more coruplicated. Moreover, linear proportionality rcsults in greater sensitivity to sound pressure differences. If a test CD with noise bands in 60-Hz steps is available, the meter may be used to obtain a frequency characteristic of a loudspeaker.
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