Acoustics – Anatomic or prosthetic relation – Ear and mouth
Patent
1976-11-09
1978-04-25
Stellar, George G.
Acoustics
Anatomic or prosthetic relation
Ear and mouth
181174, H04R 712
Patent
active
040864502
ABSTRACT:
A dynamic speaker including a cone, which is of relatively thin rigid truncated cone shape, having a number of radial ribs extending from the central opening portion toward the peripheral portion thereof, and being progressively diminishing, in respect of the stiffness at the concentrical sections, from the central opening portion toward the peripheral portion thereof, with the object of getting excellent sound effects, a high output power and other merits. Methods of manufacturing the dynamic speaker are also included in this invention.
REFERENCES:
patent: 1832832 (1931-11-01), Nagelvoort
patent: 2297218 (1942-09-01), Henrich et al.
patent: 3862376 (1975-01-01), White
patent: 3983337 (1976-09-01), Babb
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