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Animal Acoustic Communication
Avisoft Bioacoustics
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Ultrasound Microphones for the Avisoft-Bioacoustics UltraSoundGate Devices



Electret CM16
The modular device concept of the UltraSoundGate system makes it possible to use various exchangeable ultrasonic microphones. Choose the model that is most appropriate for your specific application.
Microphone principle pre-polarized condenser
(electret)
externally polarized condenser (200V)
Microphone model
Knowles
FG Series
UltraSoundGate
CM16/CMPA
Relative flatness of the frequency response poor good
Frequency range [kHz] 10-120 2-250
Relative sensitivity at 50 kHz medium high
Approximate self-noise level, bandwidth: 30- 50 kHz [dBSPL] 26 18
Directionality low medium
Reliability in high-humidity environments very good good
Total size [mm] 19 x 19 x 47 36 x 36 x 60
(including CMPA)
Weight [g] 40 65
(including CMPA)
Power requirements 5V, 6 mA
(P48 version : 48V, 10 mA)
5V, 14 mA
(P48 version : 48V, 10 mA)
Compatibile to UltraSoundGate xx16x
Part # 40001 40011
Electret

Relative signal-to-noise ratios of different microphones (sound source located exactly on-axis). Note that the s/n ratio will be degraded if the sound source is located off-axis. The off-axis attenuation will depend on the physical size of the diaphragm and the signal frequency. So, the largest model Avisoft Polaroid/CMPA is the most directional one.

See Ultrasound Microphones P48 for details on the phantom-powered microphone models that can be used with common field recorders or computer audio interfaces.
See the CM16/CMPA microphone page for details on the avilable options for connecting the condenser microphone to other recording hardware (including National Instruments devices).
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© 2009 Avisoft Bioacoustics

last modified on 19 January 2018

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