High-frequency loud speaker

Details High-frequency loud speaker High-frequency loud speaker

1982-03-03

1984-09-25

Pitts, Harold I.

Acoustics

Anatomic or prosthetic relation

Ear and mouth

181173, 181144, H04R 712

Patent

active

044737211

ABSTRACT:
A high-frequency loudspeaker has a movable diaphragm which is moved to and fro by an actuating unit. The actuating unit, under the impulses of a signal to be converted into sound waves, changes in dimension in at least two opposed directions. The diaphragm is made up of two rigid hemispherical shell diaphragms which are connected together through a resilient ring to constitute a pulsating, closed sphere. An actuating unit is disposed inside the sphere and is firmly connected to the two diaphragms, so that the forces emanating therefrom are imparted to the two diaphragms and in directions at right angles to the plane connecting between the two diaphragms. A device is provided for equalizing the atmospheric pressure within and outside the closed, spherical body. Instead of connecting the diaphragms through a ring it is also possible to have the diaphragms merge without contact through a labyrinthic seal.

REFERENCES:
patent: 1653045 (1927-12-01), Holinger
patent: 1735860 (1929-11-01), Hutchison
patent: 2064911 (1936-12-01), Hayes
patent: 2832843 (1958-04-01), Miessner
patent: 3686446 (1972-08-01), Manger

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