Broad band dynamic loudspeaker

Details Broad band dynamic loudspeaker Broad band dynamic loudspeaker

1978-12-18

1980-09-30

Robinson, Thomas A.

Acoustics

Anatomic or prosthetic relation

Ear and mouth

1791155VC, 179181R, 181165, H04R 714

Patent

active

042257573

ABSTRACT:
A dynamic loudspeaker which operates over a wide band of audio frequencies is disclosed. The speaker includes a speaker cone and voice coil structure of very low mass. A configuration of ribs on the cone and dust cap is important to both high and low frequency performance. The rear suspension for the speaker is a bearing on the voice coil structure. The bearing encircles and slides on the magnetic center pole of the speaker. A method of fabricating the low mass coil structure is disclosed, including forming the bearing surface by heat shrinkage of a low friction tape.

REFERENCES:
patent: 2429470 (1947-10-01), Knowles
patent: 2611830 (1952-09-01), Heineman
patent: 3862376 (1975-01-01), White

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