Horn speaker with linear grooves in a front surface of a pole pi

Details Horn speaker with linear grooves in a front surface of a pole pi Horn speaker with linear grooves in a front surface of a pole pi

1981-10-16

1983-03-29

Rubinson, G. Z.

Acoustics

Anatomic or prosthetic relation

Ear and mouth

1791155H, 181177, H04R 902

Patent

active

043784712

ABSTRACT:
A horn speaker wherein a pole piece of a yoke is arranged inside an annular permanent magnet and a moving coil which vibrates a diaphragm, is arranged in an air gap between the pole piece and the annular permanent magnet. A plurality of linear grooves are formed in the front surface of the pole piece in order to suppress the generation of the heat of the pole piece and the moving coil.

REFERENCES:
patent: 3830986 (1972-12-01), Yamamuro
patent: 4336425 (1982-06-01), Renkus

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