Nonwavelength-limited holographic sound field reconstruction

Details Nonwavelength-limited holographic sound field reconstruction Nonwavelength-limited holographic sound field reconstruction

1981-06-09

1983-11-15

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Acoustic image conversion

Acoustic holography

367 11, 367 13, G03H 300

Patent

active

044159960

ABSTRACT:
A method and apparatus are described for holographically generating visual representations of acoustical characteristics of sound sources. A planar array has a lattice of microphone receiving points are disposed such that evanescent wave energy from the sources is detected along with propagating wave energy. The microphone outputs are sampled, resolved into phase and amplitude components, digitized and subjected to fast Fourier transform operations to provide computer graphic display means with holographic reconstruction parameters corresponding to the sources under analysis.

REFERENCES:
patent: 3364461 (1968-01-01), Trott
patent: 3410363 (1968-11-01), Schwartz
patent: 3789354 (1974-01-01), Sternberg et al.
patent: 4119940 (1978-10-01), Keating et al.
Mano et al., 1977 Ultrasonics Sym. Proc., IEEE Cat. #77CH1264-1SU, Oct. 1, pp. 272-277.
Sasaki et al., IEEE Trans. Sonics & Ultrasonics, vol. SU-24, No. 3, May 1977, pp. 193-200.

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