End-fire microphone and loudspeaker structures

Details End-fire microphone and loudspeaker structures End-fire microphone and loudspeaker structures

1981-06-15

1983-12-20

Rubinson, G. Z.

Acoustics

Anatomic or prosthetic relation

Ear and mouth

179146E, 181184, 181182, H01R 110

Patent

active

044219571

ABSTRACT:
Highly directional response patterns can be obtained by connecting microphones or loudspeakers with tubular coupling path structures. The coupling paths comprise a plurality of elements (110,111 . . . 157) arranged in pairs (110,111; 112,113; . . . 156,157) so that for every element (110) below a center line (102) there is an element (111) above the line. Furthermore, the relationship between the element pairs is nonlinear. The desired directional response comprises one main lobe and a plurality of substantially smaller lobes below a determinable threshold value. The elements may be a bundle of tubes (90) or a plurality of apertures (110,111, . . . 157) in a single tube (100).

REFERENCES:
patent: 1475769 (1923-11-01), Meyer
patent: 1795874 (1931-03-01), Mason
patent: 1825166 (1931-09-01), Sullivan
patent: 1847283 (1932-03-01), Volf, Jr.
patent: 1847284 (1932-03-01), Volf, Jr.
patent: 1876466 (1932-09-01), Moore, Jr.
patent: 3739096 (1973-06-01), Iding

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