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Hardware and Software for Investigating
Animal Acoustic Communication
Avisoft Bioacoustics
Schönfließer Str. 83
16548 Glienicke
Germany

tel +49 33056 426086
fax +49 33056 426087
infoavisoft.com

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USG Electret Ultrasound Microphone (Avisoft Bioacoustics / Knowles SPM)

part # 40003
Electret Ultrasound Microphone
  • Approximate input-referred self-noise level (bandwidth: 30-50 kHz): 24 dB SPL
  • Power supply : 5V, 14 mA (provided by UltraSoundGate xx16x)
  • Conncetor: male XLR-5 plug
  • Diameter : 20 mm
  • Length : 47 mm
  • Weight : 40 g
The Avisoft Bioacoustics electret ultrasound microphone is a cost-effective model that employs an SPM-series electret capsule by Knowles. The moderate sensitivity and relatively poor flatness of the frequency response is still acceptable for many applications. However, due to its sensitivity to humidity, it is not recommended for outdoor use (otherwise, the capsule may be permanently damaged).
Frequency response SPM

frequency response
Polar diagram SPM

polar diagram

P48 Electret Ultrasound Microphone (Avisoft Bioacoustics / Knowles SPM)

for third-party recording equipment that can supply a 48V phantom power
part # 40004
Electret Ultrasound Microphone
  • Approximate input-referred self-noise level (bandwidth: 30-50 kHz): 24 dB SPL
  • Power supply : 48V, 10mA phantom power
  • Conncetor: male XLR-3 plug
  • Diameter : 20 mm
  • Length : 47 mm
  • Weight : 40 g

© 2005 Avisoft Bioacoustics

last modified on 05 September 2016