Method and apparatus for detecting sound source

Details Method and apparatus for detecting sound source Method and apparatus for detecting sound source

1983-09-30

1985-08-06

Ciarlante, Anthony V.

Measuring and testing

Vibration

By mechanical waves

73641, 73146, G01N 2904

Patent

active

045328072

ABSTRACT:
In a method and an apparatus for detecting a sound source, a measurement plane to be observed is automatically scanned in two-dimensional manner by means of two microphones which are spaced apart from each other by a given distance and are moved by a traversing device. Outputs of these microphones are sampled for successive measurement regions and then are processed by processing circuit including a fast Fourier transform to derive acoustic intensities with respect to various frequencies in a given frequency range. Then, a distribution of the acoustic intensities is indicated on a display device by using various indication techniques. Therefore, since the measurement is effected by using the acoustic intensity representing both a sound power and a propagating direction, the analysis of the sound source can be performed in an easy and accurate manner, and an entier apparatus can be small in size and inexpensive in cost.

REFERENCES:
patent: 3534591 (1970-10-01), Phelan
patent: 3996791 (1976-12-01), Niklas et al.
patent: 4063549 (1977-12-01), Beretsky et al.
patent: 4170142 (1979-10-01), Posakony et al.
patent: 4301684 (1981-11-01), Thompson et al.

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