Surface microphone Type 40PS

The Surface Microphone Type 40PS is a low-cost microphone for general purpose measurements on planar and curved surfaces. It has a wide useful frequency range reaching up to 20 kHz and a large dynamic range topping at around 136 dB.

It has an integrated CCP¹ preamplier and is delivered with a built-in TEDS² chip which enables it to be programmed as a complete unit. The Type 40PS requires a constant-current power supply, e.g. the G.R.A.S. CCP Supply Type 12AL, or any other CCP compatible power supply.

Close manufacturing tolerances together with the advantages of the TEDS chip, provide the Type 40PS with a high degree of interchangeability; a major advantage which excludes accounting for individual characteristics.

The Type 40PS is both stable and robust. It has an integrated 1 m co-axial cable with a microdot connector and is delivered with a supple detachable silicon-rubber fairing.

Because of its lightness, the microphone with fairing can readily be mounted on surfaces using double-sided adhesive tape.

¹ Constant Current Power

² Transducer Electronic Data Sheet according to IEEE-1451.4.

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5 mV/Pa at 250 Hz

136dB re. 20μPa (without clipping)

< 32dBA re. 20μPa (thermal noise)

100 Hz - 3 kHz (±1 dB)
20 Hz - 10 kHz (±3 dB)
20 Hz - 20 kHz (±6 dB)

Coaxial microdot

-20 °C to +80 °C

< 50 ohm

Integrated with coaxial microdot connector
Cable length: 1.5 m
Cable diameter: 1.1 mm
special: on request

2.8 mm

40 mm (with fairing)
13.2 mm (without fairing)

3 g