ACAM_64 is an 88 microphone array, and real-time beamformer. It can build a 3232 pixel image of sound sources in real-time, with adjustable frequency response within 20 Hz to 8 kHz.
Its massively parallel beamforming DSP allows the instrument to build each pixel concurrently with no missed sample.
The instrument can be controlled, and the images can be retrieved using an open protocol based on virtual Com port. That open protocol can be used on any platform that has a generic USB CDC driver. That includes Windows, Linux and Mac-OS.
The instrument can stream audio to the host platform through a USB-Audio interface. Through that interface the instrument is seen by the host as a USB microphone. That audio signal is the output of the beamformer and can be steered digitally to any azimuth and elevation in the field of view of the camera. Using the provided Windows application, the beamformer can even track any acoustic source in the field of view.
That USB-Audio interface works on any platform that has a generic USB-Audio driver. That includes Windows, Linux and Mac-OS.
The ACAM_64 presents acoustic images, showing sound sources in the field of view of the instrument. But it does not show an optical image, so it is difficult to match acoustic hot zones with the actual pieces of equipment creating the noise. The optical camera kit captures the scene in parallel to ACAM_64, and Instrument Manager presents the optical image superimposed onto the acoustic image. The videos below show how that optical image facilitates the interpretation of the acoustic image.
A complete Windows application is provided to operate the camera, view and record images of the sound source.
Specifications
- Bandwidth: 20 Hz to 8 kHz
- Aperture: 64 microphones arranged in a square array: 168x168mm
- Image Resolution: 32 x 32 Pixels
- Field of View: Selectable: 90 deg or 60 deg
- Image Persistence: Adjustable 10ms to 10s
- Rate of Image Capture: Up to 1 image per ms
- Microphone Sensors: Digital MEMS
- Saturation Level (typical at 1 kHz): 120 dB SPL
- Duty Rate of Signal Capture and Processing: 100% - No Missed Samples
- Connectivity (Image Capture and Configuration): USB (Virtual Com Port interface with open communication protocol)
- Connectivity (Beamformers Audio Signal): USB Audio Interface (Seen by the host as a USB microphone)
- USB-Audio Interface (Sampling Rate): 16 kHz
- USB-Audio Interface (Formats): PCM 16-bits mono, IEEE-754 (32-bit Float)
- Temperature Range: -20 to 60 C
- Compatibility: Windows, Linux and Mac-OS (Note: Ready-to Run applications are provided for the Windows environment. But the instrument will be recognized on any platform that has generic USB drivers for CDC (Virtual Com Ports) and Audio)
- Dimensions: 187 mm x 1822 mm x 16 mm
- Mounting: Standard Tripod Adaptor (Not Included)
- Weight: 240 g
- Protocol: Open and documented
Applications:
- Detection, tracking and recording of acoustic sources
- Sound proofing
- Mechanical product design for acoustical performance
Kit includes:
- 1x ACAM_64 Acoustic camera
- 1x USB cable
- 1x Threaded mount adapter (to attach a tablet mount to the back of ACAM_64).
- A USB camera
- A bracket to mount the camera on the back of the ACAM_64 casing
- Full support in Instrument Manager V12.0 and up
- 1x 25mm wrench for tablet mount adapter.
