Deconvolution Methods and Systems for the Mapping of Acoustic Sources from Phased Microphone Arrays

Author: Brooks, Thomas F.
Published: May 1, 2012.
Physical Description: 1 electronic document
Additional Creators: Humphreys, Jr., William M.

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Summary

Mapping coherent/incoherent acoustic sources as determined from a phased microphone array. A linear configuration of equations and unknowns are formed by accounting for a reciprocal influence of one or more cross-beamforming characteristics thereof at varying grid locations among the plurality of grid locations. An equation derived from the linear configuration of equations and unknowns can then be iteratively determined. The equation can be attained by the solution requirement of a constraint equivalent to the physical assumption that the coherent sources have only in phase coherence. The size of the problem may then be reduced using zoning methods. An optimized noise source distribution is then generated over an identified aeroacoustic source region associated with a phased microphone array (microphones arranged in an optimized grid pattern including a plurality of grid locations) in order to compile an output presentation thereof, thereby removing beamforming characteristics from the resulting output presentation.

Other Subject(s)

Acoustics

Collection

NASA Technical Reports Server (NTRS) Collection.

Note

Document ID: 20120009525.

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