Portable Handheld Pistonphone calibrates acoustic equipment.
September 7, 2010 -
Compatible with 1/8, ¼, and ½ in. measurement microphones, battery-operated Endevco® Model EM42AA serves as stable sound source for accurate calibrations. Unit offers sound pressure calibration level of 114 dB re. 20 µPa at frequency of 250 Hz ±0.5%. Dual-color LED above ON/OFF switch indicates both battery condition and operational stability. Factory calibrated with accuracy of ±0.08 dB re. 20 µPa, pistonphone is supplied with calibration certificate.
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Original Press release
Meggitt Sensing Systems (Endevco Corp.)
30700 Rancho Viejo Rd.
San Juan Capistrano, CA, 92675
USA
Meggitt Sensing Systems Debuts Endevco® Portable Handheld Pistonphone for Precision Acoustic Calibrations
San Juan Capistrano, California, USA - Meggitt Sensing Systems, a Meggitt group division, has announced the launch of the new Endevco® model EM42AA pistonphone, a battery operated handheld precision acoustic calibrator, designed to serve as a highly stable sound source for accurate and reliable calibrations of measurement microphones, sound level meters and other acoustic equipment.
Designed to be directly compatible with both Endevco® and other industry 1/8-inch, ¼-inch and ½-inch measurement microphones, the Endevco® model EM42AA pistonphone offers a sound pressure calibration level of 114 dB re. 20 µPa, at a frequency of 250 Hz ±0.5%. To use the pistonphone, simply fit the microphone into the coupler and switch on, enabling the device to produce a constant sound pressure level on the microphone diaphragm. The Endevco® model EM42AA is most routinely used for calibrating ½-inch microphones and can be delivered with a 1-inch microphone calibration coupler, if preferred. Adapters are also included for calibrating ¼-inch and 1/8-inch microphones.
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. To further ensure reliable performance, the Endevco® model EM42AA has a dual-color LED above the ON/OFF switch to indicate both battery condition and operational stability. When the pistonphone is operating properly, the LED shows green, indicating that cam speed is correctly locked at 250 Hz. If the LED displays as red during pistonphone operation, speed is incorrect, most likely because of low batteries.
Because of its high stability and ability to retain precision accuracy, even under hostile environmental conditions, the Endevco® model EM42AA can be used as either a laboratory standard sound source, or as field calibrator for end-to-end system checks of complete acoustic measurement systems. For more information about the Endevco® model EM42AA pistonphone or other products available from Meggitt Sensing Systems, visit www.meggittsensingsystems.com.
About Meggitt Sensing Systems
Meggitt Sensing Systems, a Meggitt group division (www.meggitt.com), is a leading supplier of high-performance sensing and monitoring systems for physical parameter measurements in extreme environments. It has operated since 1927 through its antecedents-ECET, Endevco, Ferroperm Piezoceramics, Lodge Ignition, Sensorex, Vibro-Meter and Wilcoxon Research-whose portfolios form the basis of product lines offered by today's Meggitt Sensing Systems. Meggitt's Endevco® range of piezoelectric, piezoresistive, Isotron® and variable capacitance accelerometers, piezoresistive pressure transducers, acoustic sensors, electronic instruments and calibration systems ensure critical accuracy and reliability within aerospace, automotive, defense, industrial, medical, power generation, R&D, space and test and measurement applications. Endevco® and Isotron® are registered trademarks of the Meggitt group.
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