Method and devices for the omnidirectional radiation of sound wa

Details Method and devices for the omnidirectional radiation of sound wa Method and devices for the omnidirectional radiation of sound wa

1978-09-06

1982-03-30

Brigance, Gerald L.

Acoustics

Anatomic or prosthetic relation

Ear and mouth

181175, 181199, H04R 102

Patent

active

043225780

ABSTRACT:
The present invention pertains to a method and apparatus for achieving a uniform omnidirectional radiation of sound waves, particularly at high frequencies, and for increasing selectivity and separation at frequencies in the medium to high frequency wave band The apparatus consists of a series of reflector-diffractor barriers which are frequency selective. Each barrier is operative to transmit sound waves of a frequency greater than a selected value and to reflect and omnidirectionally radiate sound waves of a frequency less than the value.

REFERENCES:
patent: 2805728 (1957-09-01), Manley
patent: 3400217 (1968-09-01), Kraut
patent: 3467218 (1969-09-01), Fusimoto et al.
patent: 3862366 (1975-01-01), Huszty et al.
patent: 3909530 (1975-09-01), Gosswiller
patent: 3912866 (1975-10-01), Fox
patent: 3964571 (1976-06-01), Snell
patent: 3980829 (1976-09-01), Beveridge
patent: 3985957 (1976-10-01), Torn
patent: 4189627 (1980-02-01), Flanagan
patent: 4200170 (1980-04-01), Williams, Jr.

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