High-fidelity moving-coil loudspeaker

Details High-fidelity moving-coil loudspeaker High-fidelity moving-coil loudspeaker

1974-08-01

1976-03-16

Claffy, Kathleen H.

Acoustics

Anatomic or prosthetic relation

Ear and mouth

181152, 181184, 181191, 181192, H04R 906

Patent

active

039447570

ABSTRACT:
In a moving-coil type loudspeaker, a tubular member of a length longer than the wave-length of any one of the frequencies in a desired frequency range and having a constant cross-sectional area along its length, is coupled, at one end thereof, with one side of a vibrating plate or diaphragm through an acoustic transformer constituted by a cavity formed therebetween, whereby the loudspeaker is capable of reproducing sounds with high fidelity particularly in extremely low frequency ranges.

REFERENCES:
patent: 1002205 (1911-08-01), Graham
patent: 1081352 (1913-12-01), Weber
patent: 1687566 (1928-10-01), Hunt
patent: 1763381 (1930-06-01), Van Dyck et al.
patent: 1806598 (1931-05-01), Denoux
patent: 1809035 (1931-06-01), Hawley
patent: 2146325 (1939-02-01), Allison
Electronic Engineering, Apr. 1946, pp. 109-111, "Microphones -- A Detailed Review of their Design and Characteristics," S. W. Amos et al.

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