Meggitt Sensing Systems Introduces New Endevco Low-Profile Surface Microphone

By DE Editors

Meggitt Sensing Systems has introduced the Endevco model EM40PS, a low-profile surface microphone with integral ISOTRON (IEPE-type) amplifier and TEDS,  designed to facilitate simplified larger channel count acoustic measurements on typical planar and curved surfaces exposed to air slipstreams.

The design of model EM40PS requires no microphone holders or stands, and incorporates a dust-free, water-repellant grid cap and a detachable silicon rubber fairing, allowing for near-flush mounting on curvilinear surfaces and mounting pads. Models also include an integral 3.3 ft (1 m)  coaxial cable with microdot connector.

Units offer a nominal sensitivity of 5 mV/Pa (@ 250 Hz), wide audio frequency range from 20 Hz to 20 kHz and large dynamic range from <30 dBA to 136 dB over an operating temperature range of -20ºC to +80ºC (-4ºF to +176ºF) with low sensitivity to base bending.

The EM40PS contributes very little mass to thin plates, and can be laid flat on its 2-in. (51mm) diameter rubber pad, or surface mounted using a double-sided adhesive pad for automotive, aeronautical, general acoustics and sound pressure level testing requirements. Pressure equalization is via a vent placed at the front of the microphone by the side of its diaphragm,  important for both aircraft usage and on-road vehicle measurements in mountainous country.

For more information, visit Meggitt Sensing Systems.

Sources:  Press materials received from the company and additional information gleaned from the company’s website.