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Acoustic Holography

For measurements close to a source, acoustic holography provides fast and accurate acoustic maps of sound pressure, sound intensity and other sound field parameters at low to medium frequencies (100 Hz to 2 kHz).

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Engineer touching robot-controlled acoustic holography for hearing aid development. The measurements are coupled with Statistically Optimized Near-field Acoustic Holography (SONAH) from BKSV (now HBK).

Our patented algorithms ‘SONAH’ and ‘ESM’ allow accurate measurement with relatively small arrays without encountering edge effects. Acoustic holography also allows results to be calculated closer to and further away from the source, and the capability of the system can be augmented with an automatic positioning system, transient and quasi-stationary calculations and sound quality metrics. Wideband holography extends the use of holography far beyond the usual frequency range limit.

acoustic holography

System Suggestion

A basic PULSE acoustic holography system comprises measurement and post-processing software, a planar sliced wheel array of 18 microphones and LAN-XI data acquisition hardware including the frame, modules and front panels. The system is ideal for mapping noise from engines, vehicle components, appliances, power tools, etc., and for sub-source sound power contribution analysis.

Related Information

BK Connect Type 8430

Array Analysis Software

BK Connect Array Analysis enables real-time noise source location and mapping using a microphone array. Point-and-shoot measuring results and video recordings provide detailed analysis using beamforming and holography technology.

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Acoustic Holography

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