Electroacoustic device with broad frequency range directional re

Details Electroacoustic device with broad frequency range directional re Electroacoustic device with broad frequency range directional re

1985-03-22

1987-03-31

Fuller, Benjamin R.

Acoustics

Plural diaphragm sound sources

Plural chambers

181147, 181158, 181160, 381 91, H05K 500

Patent

active

046536060

ABSTRACT:
An electroacoustic device comprises an array of electroacoustic transducer elements for producing a prescribed directional response pattern at a first frequency. Each element includes apparatus for restricting the frequency range of sound waves incident on said element so that the directional response pattern is invariant over a prescribed frequency band.

REFERENCES:
patent: 3204031 (1965-08-01), Gorike et al.
patent: 3626365 (1971-12-01), Press
patent: 4131760 (1978-12-01), Christensen et al.
patent: 4314098 (1982-02-01), Maerfield
patent: 4485484 (1984-11-01), Flanagan
The Bell System Technical Journal, vol. 58, No. 4, Apr. 1979, "Acoustic Filters to Aid Digital Voice", by J. L. Flanagan, pp. 903-944.

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