Options for holography and beamforming

The capabilities of all of our advanced PULSE noise source identification software can be extended with these optional calculation modules.

GENERAL MODULES

• These apply to all beamforming and holography post-processing array acoustic software:
• Quasi-stationary Calculations BZ-5635
• Transient Calculations BZ-5636
• Conformal Calculations BZ-5637
• Sound Quality Metrics BZ-5638
• Create, save, and run your own calculations with External Plug-in Manager BZ-5652

FOR ACOUSTIC BEAMFORMING

The capabilities of Spherical Beamforming Type 8606 and Beamforming Type 8608 can be extended with the optional calculation module:

• Refined Beamforming Calculations BZ-5639 can improve the spatial resolution of the noise maps by a factor of three to six, for objects composed of non-coherent sources. This deconvolution algorithm has been developed with the automotive industry for use in wind-tunnel measurements, and has many outdoor applications such as wind turbines, trains and flyover moving-source beamforming

FOR ACOUSTIC HOLOGRAPHY

The capabilities of our noise source location software, Acoustic Holography Type 8607, can be extended with these optional additions. They all use a hand-held probe with two layers of microphones in conjunction with a positioning system that locates the probe in relation to the object under test.

• Wideband Holography BZ-5644 is our patented calculation method that allows a single measurement at an intermediate distance to cover the combined frequency ranges of statistically optimized nearfield acoustic holography (SONAH) and beamforming – extending the higher frequency limit of holography
• Proximal Holography BZ-5963 enables conformal noise‐mapping of transient events to create animated, 3D noise maps on a 3D model of the test object, using Brüel & Kjær’s equivalent source method (ESM) algorithm
• Panel Contribution BZ-5640 quantifies the contributions to the total sound pressure level at the driver's ear from the various surfaces inside a vehicle, using a volume velocity source to establish the frequency response functions
• Intensity Component Analysis BZ-5641 gives better understanding of the sound field inside cabins and other enclosed spaces, using a volume velocity source and operational measurements to map front source intensity, rear source intensity, scattered intensity, radiated intensity
• In Situ Absorption BZ-5642 helps to map acoustical absorption of various panels to optimize interior trim and detect acoustic leaks