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Pistonphone 134 dB, 250 Hz | 42AC
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Description
The G.R.A.S. 42AC Pistonphone, high pressure is a precision sound source for calibrating microphones. It is battery operated and produces a constant sound pressure level of 134 dB re. 20µPa (equivalent to 100 Pa) at250 Hz, or 125.4 dBA re. 20µPa.
Typical applications and use
Reference sound source
Precision microphone calibrations
Microphone comparisons
Precision hydrophone calibrations
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Piston phones & calibration equipment
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