Handheld Pistonphone from Meggitt

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Meggitt Sensing Systems
September 26, 2010

The Endevco Model EM42AA from Meggitt Sensing Systems, San Juan Capistrano, CA, is a battery-operated, handheld precision acoustic calibrator designed to serve as a highly stable sound source for calibrations of measurement microphones, sound-level meters, and other acoustic equipment. The pistonphone is compatible with Endevco and other industry 1/8 in., 1/4 in., and 1/2 in. measurement microphones, and offers a sound pressure calibration level of 114 dB re. 20 µPa at 250 Hz ±0.5%. Each pistonphone is factory calibrated with an accuracy of ±0.08 dB re. 20 µPa and supplied with an individual calibration certificate stating exact value and test conditions. A dual-color LED indicates battery condition and operational stability.


CompanyMeggitt Sensing Systems
CountryUnited States (USA)


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