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Hardware and Software for Investigating
Animal Acoustic Communication
Avisoft Bioacoustics
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16548 Glienicke

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Animal Sounds

UltraSoundGate 116Hbm for passive bat monitoring applications

part # 61160
Cost-effective bus-powered ultrasound recording interface with a balanced analog input, rugged aluminum housing and USB 2.0 interface. This stripped-down model is suited for stationary long-term bat call monitoring applications.

A low-cost netbook computer such as a Samsung N220 (with 65 Wh battery) can continuously run the recording system for more than 9 hours (with all possible power saving options activated).

A mains-powered desktop PC can operate the recording system in an unattended mode for several months. The BIOS RTC alarm feature in combination with the RECORDER software autostart and shut down commands would allow to run the system only for a few hours each night.

The included Avisoft-RECORDER USGH software provides various automated trigger, timer and log file options that support this kind of long-term monitoring.

The log files created by the included RECORDER USGH software can be sent automatically via email in order to indentify potential problems at remote field stations. See the
blm tutorial for automatically sending log files via email

UltraSoundGate 116Hbm
UltraSoundGate 116Hbm front view

Number of channels 1
ADC type Delta-Sigma architecture with integrated adaptive anti-aliasing filter
Resolution 16 bit or 8 bit
Sample rates [kHz] 300, 250, 214, 187.5, 166.6, 150, 125, 100, 75, 62.5, 50
Frequency response (-3dB, external input without mic) 20 Hz - 140 kHz
Acoustic monitor output no
Overload indicator (red LED) no
Peak level meter (4 LEDs) no
Input sensitivity (max trim) -43.2dBV = -41 dBu = 6.9 mVrms
Input sensitivity (min trim) -3.2dBV = -1 dBu = 0.69 Vrms
Gain adjustment potentiometer 40 dB continuous range
Input impedance 50 kOhm
Analog input connector female XLR-5 socket
Other inputs none
Computer interface USB 2.0, isochronous high-speed mode
Physical USB connection standard B-type USB socket
Maximum power supply current (drawn from the USB) 160 mA
Housing compact aluminum enclosure
Physical dimensions (W/H/D) in mm 90 x 53 x 130
Weight 290 g
Included software Avisoft-RECORDER USGH
USG 116Hbm principle

Principle of the UltraSoundGate 116Hbm recording system

Recommended accessories

  • Sound analysis software Avisoft-SASLab Pro (part# 10101 / 10102)

UltraSoundGate 116Hbm with condenser microphone

part # 61161
  • UltraSoundGate 116Hbm with Avisoft-RECORDER USGH,
  • Very sensitive externally polarized condenser microphone (CM16 + CMPA) with a flat frequency response, replaceable capsule, low-noise and low-distortion preamplifier (no spare capsule included),
  • Microphone extension cable (5 m),
  • Microphone stand (microphone clamp and mini tripod),
  • USB-powered microphone heating,
  • Rain protection tube for the microphone.

UltraSoundGate 116Hbm with electret microphone

part # 61162
  • UltraSoundGate 116Hbm with Avisoft-RECORDER USGH,
  • Rugged electret microphone,
  • Microphone extension cable (5 m),
  • Microphone stand (microphone clamp and mini tripod),
  • Rain protection tube for the microphone.

Optionally available accessories

  • Power supply cable (#51170) suited for powering an ASUS Eee PC 1000H (or 901) directly from an external 12V lead acid battery,
  • 40 kHz or 20 KHz test signal speaker (#60105 / #60106 ) with 10 m extension cable and mini tripod for routinely testing the recording system by playing a .wav file through the PC soundcard, which is supported by the RECORDER software command Monitoring/Test signal...
  • Microphone calibration kit (part# 60110)

What are the advantages of this PC-based bat monitoring system?

  • Almost unlimited recording capacity because large computer harddisks (or external 2.5" bus-powered USB harddisks) are being used to save the recorded sound files, which enables unattended recording throughout the entire season!
  • The accompanying versatile recording software provides a wide range of recording options that include advanced algorithms for detecting even very soft bat calls that are almost buried in the background noise floor (trigger option 'whistle tracking' or the more sophisticated "bat call filter").
  • The trigger thresholds and frequency intervals can be adjusted visually on the real-time spectrographic display.
  • The recorded sound files are saved as common .wav files that can be processed by various sound analysis software applications.
  • The intregrated call parameter measurement tool can help to indentify species in real-time.
  • An optional sound file input mode (which replaces the microphone input signal by a .wav file) allows to test and to optimize the current trigger settings on a previously recorded sound file.
  • For projects that require unattended recording for several days or weeks, a special test signal playback mode allows to test the system periodically by connecting an ultrasound speaker (#60105) to the PC.
  • The sample rate can be adapted to the required frequency range (there is an integrated anti-aliasing filter that allows to sample the analog input signal at lower rates without introducing artifacts) and the bit depth can be reduced to 8 bits in order to save storage space.
  • There are two different microphone options in order to best suit various field conditions: The sensitive condenser microphone CM16/CMPA provides best results under (relatively) dry field conditions, while the electret microphone will still work under more humid conditions (at the expense of a reduced sensitivity at higher frequencies above about 50 kHz). Though, the supplied heating module for the condenser microphone can improve its performance in very humid environments. The condenser microphone option will significantly improve the ability to capture high-frequency echolocation calls such as those emitted by horseshoe bats.
  • Optionally available very long microphone extension cables allow placing the microphone as far as 1000 meters from the base unit and the computer.
  • The PC platform ensures that the system can be easily integrated with additional (cost-efficient) components such as remote access via wireless internet services (see internet connectivity) and that it will be possible to adapt the system incrementally to future advances in technology, such as improved mass storage media or LTE internet services for instance.
  • The UltraSoundGate 116Hbm is certainly very well suited for acoustic bat monitoring projects at wind energy facilities (it provides numerous significant advantages over competitive systems).

In case it was sufficient to monitor and record signal frequencies below 80...90 kHz, the low-cost bat montoring system could be used instead of the UltraSoundGate 116Hbm.

Avisoft Bioacoustics also provides powerful tools for conducting bat transect surveys. See the Avisoft Bat Survey sample.

Return to UltraSoundGate Home.

© 2008 Avisoft Bioacoustics

last modified on 15 July 2011