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Animal Acoustic Communication
Avisoft Bioacoustics
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16548 Glienicke
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Ultrasound Microphones for the Avisoft-Bioacoustics UltraSoundGate Devices



Electret CM16 Polaroid
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
Knowles
SPM Series
EP3 UltraSoundGate
CM16/CMPA
Polaroid/CMPA
Relative flatness of the frequency response poor poor poor good poor
Frequency range [kHz] 10-120 10-110 10-150 2-250 10-150
Relative sensitivity at 50 kHz medium high medium high high
Approximate self-noise level, bandwidth: 30- 50 kHz [dBSPL] 26 24 24 18 12
Directionality low low low medium high
Reliability in high-humidity environments very good poor very good good good
Total size [mm] 19 x 19 x 47 36 x 36 x 60
(including CMPA)
50 x 50 x 60
(including CMPA)
Weight [g] 40 65
(including CMPA)
75
(including CMPA)
Power requirements 5V, 6 mA 5V, 14 mA
(P48 version : 48V, 10 mA)
Compatibile to UltraSoundGate xx16x
Part # 40001 40003 40005 40011 40016
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 CF-card 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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last modified on 05 September 2016

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