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Acoustic Camera - wind turbine microphone array

The acoustic camera with the special wind turbine microphone array suits perfect with its big diameter of 500 cm for very low frequency sound sources. The 40 microphones are making sound visible and are localizing noise exactly from 50 Hz. The optimized microphone distribution guarantees a perfect sound source localization and a high dynamic range. Although the system has a diameter of 500 cm dismounted it can be convoyed in a car. Setup time is about 30 min. Typical applications are wind power plants, industrial facilities and environmental measurement.

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size of the acoustic camera 5000 mm
Spezifikationen der akustischen Kamera <33 dB to 120 dB with up to 40 dB dynamic
number of microphones of the acoustic camera 40 MEMS-microphones, 24 bit resolution,
Samplerate 48 kHz, frequencyrange 10 Hz - 24 kHz
recommend frequency range of the acoustic camera from 50 Hz with beamforming-methods; below with decreased resolution°
material of the acoustic camera aluminium
weight of the acoustic camera 75 kg

The data acquistion system is a National Instruments embedded-controller with real-time operating system and FPGA.

Number of channels 40
Samplerate per channel 48 kS/s
Resolution 24 bit
Synchronous sampling Yes
Interface to PC Ethernet
Fanless Yes
Additional inputs Trigger, Tacho (RPM)
Powersupply 12 V
Consumption < 7 W
Dimension 23 cm x 18,5 cm x 5,8 cm
Weight 2 kg

The Noise Inspector software is the standard solution for visualizing sound sources. The application-oriented software guides you from data acquistion to analysis to saving and reporting of acoustic data.

  • Online- and offline analysis
  • Acoustic-photo und acoustic-video
  • A lot of HD algorithms: Beamforming, EVOB, CLEAN SC, MUSIC, Capon, DAMAS, Real 3D Beamforming,...
  • Frequency analysis and time-frequency analysis (sonogram)
  • Acoustic weighting (A, B, C) or linear presentation
  • Open interface to Matlab for own algorithms
  • Easy export of terce/octave, measurement, acoustic-photo and acoustic-video
  • Playback of local sound
The following accessories are available for this system:

Zubehör Akustische Kamera Kalibratoradapter
Calibrator adapter
Zubehör Akustische Kamera Akku
Zubehör Akustische Kamera Kalibrator
Notebook or Tablet
Zubehör Akustische Kamera Pelicase
Flight case
Zubehör Akustische Kamera Windschützer

The Breakout Box extends the data acquisition system for connecting ICP/IEPE and analoge sensors the Frontend.

Number of channels 8 to 40
Sensor interface ICP, IEPE and analog sensors single switchable
Input voltage ± 5 V
Samplerate per channel 48 kS/s
Resolution 24 bit
Synchronous sampling Yes
Interface Connection to I²S Frontend
Fanless Yes
Powersupply 12 V
Consumption < 1 W
Dimension 14 cm x 7,5 cm x 5 cm
Weight 0,5 kg
5m Array focusing on a wind turbine
low frequency sound radiation