HEAD VISOR hardware – Microphone arrays for localizing sound sources using beamforming technology
The HEAD VISOR measurement system comprises the software and a microphone array. The...
The HEAD VISOR measurement system comprises the software and a microphone array. The acoustic camera uses beamforming technology to pinpoint sound sources in real time. Various microphone arrays are available for different applications. Some are scalable and customizable and all can be activated and controlled with HEAD VISOR software.
As soon as the microphone array is switched on, HEAD VISOR software provides video images with simultaneously overlaid, high-quality source mapping. This feature allows you to obtain the necessary information about the sound source without any time delay.
All three hardware versions combine beamforming with MultipleEye technology, using three cameras to record the video images in real time. This process enables distances to all points in the image to be determined with exceptional precision and allows continuous, synchronous video images in real time.
The following HEAD VISOR microphone arrays are available for the acoustic camera:
- HEAD VISOR VMA II.1: Mobile microphone array for flexible applications
- HEAD VISOR VMA III.0: Lightweight microphone array for stationary applications (e.g. in wind tunnels)
- HEAD VISOR flex: Modular microphone array for sound source localization over large distances or at low frequencies.
The HEAD VISOR measurement system comprises the software and a microphone array. The acoustic camera uses beamforming technology to pinpoint sound sources in real time. Various microphone arrays are available for different applications. Some are scalable and customizable and all can be...
The HEAD VISOR measurement system comprises the software and a microphone array. The acoustic camera uses beamforming technology to pinpoint sound sources in real time. Various microphone arrays are available for different applications. Some are scalable and customizable and all can be activated and controlled with HEAD VISOR software.
As soon as the microphone array is switched on, HEAD VISOR software provides video images with simultaneously overlaid, high-quality source mapping. This feature allows you to obtain the necessary information about the sound source without any time delay.
All three hardware versions combine beamforming with MultipleEye technology, using three cameras to record the video images in real time. This process enables distances to all points in the image to be determined with exceptional precision and allows continuous, synchronous video images in real time.
The following HEAD VISOR microphone arrays are available for the acoustic camera:
- HEAD VISOR VMA II.1: Mobile microphone array for flexible applications
- HEAD VISOR VMA III.0: Lightweight microphone array for stationary applications (e.g. in wind tunnels)
- HEAD VISOR flex: Modular microphone array for sound source localization over large distances or at low frequencies.
Highlights
- Acoustic camera with beamforming technology for localizing sound sources online
- Customizable, scalable system for diverse applications
- Extremely high location accuracy
- Option to combine different arrays
- Interactive working possible because changes are visualized in real time
- MultipleEye technology: Continuous, synchronous video images in real time and ability to determine distances to all points in the image with exceptional precision
Applications
- Troubleshooting
- Analyzing and optimizing sounds
- Room and structural acoustics
- Leak detection/testing
- Test benches
- Detecting sound-radiating components on test pieces
- Visualizing acoustic weak points
- Wind tunnels
- Eliminating rough edges with a major impact on interior wind noise
- Wind turbines
- Auralizing locations that radiate the most sound energy
- Localizing sources of typical wind turbine noise
- Analyzing the acoustic effects of different rotor designs
Features
- High-quality hardware components for HEAD VISOR beamforming systems
- Additional sensors can be connected (integration of HEADlab products)
- All microphone arrays can be combined
- Near-field HEAD VISOR Probe can be connected to microphone arrays
- VMA II.1: Mobile array with 7 spiral arms (56 microphones), 3 cameras and integrated front end
- VMA III.0: 14 spiral arms (112 microphones), 3 cameras and integrated front end
- HEAD VISOR flex: Customizable microphone array with camera module and HEADlab technology; dimensions, number of channels and geometry all modifiable
- All arrays can be linked to a PC via a network cable
Variants
HEAD VISOR VMA II.1
HEAD VISOR VMA II.1 has 56 microphones positioned in a spiral pattern across a diameter of 80 cm and is easy to transport. The spiral arrangement allows distances of 30 cm to 200 m between the microphone array and sound source, with dynamics of 13 dB (standard beamforming). Advanced algorithms extend the dynamics to 20–30 dB in a frequency range of 300 Hz–20 kHz.
HEAD VISOR VMA III.0
The HEAD VISOR VMA III.0 array, with 112 microphones and a diameter of 3 m, is suitable for installation on a wall or ceiling, which means it can be used in e.g. wind tunnels. The 14 arms allow dynamics of 10 dB (standard beamforming) or up to 30 dB (advanced algorithms) in a frequency range of 200 Hz–20 kHz.
HEAD VISOR flex
HEAD VISOR flex is a modular microphone array for sound source location. Its configuration, size, layout and number of microphones can be adjusted to suit your needs. HEAD VISOR flex delivers extremely high accuracy for localizing sounds over large distances or at low frequencies of less than 100 Hz.
HEAD VISOR Probe
The near-field HEAD VISOR Probe helps with investigating stationary sounds at frequencies below 600 Hz and acts as a supplement to the microphone arrays. Sound is detected directionally via two microphones at the tip of the probe. MultipleEye technology determines the current position of the probe in real time. The probe therefore allows specific sub-areas to be calibrated. The near-field HEAD VISOR Probe can be connected to the array, which allows a frequency range of 20 Hz–20 kHz to be evaluated.
