Acoustical speaker device

Details Acoustical speaker device Acoustical speaker device

1977-12-05

1978-10-31

Stellar, George G.

Acoustics

Anatomic or prosthetic relation

Ear and mouth

181150, 181151, 181153, H04R 128

Patent

active

041236211

ABSTRACT:
An acoustical speaker device adapted to be recessed in, for example, the ceiling of a room, has a paraboliform loudspeaker housing with an open end and an aperture formed at its concave end generally coaxial with the open end. A collar coaxially surrounds and extends outwardly of the housing from the concave end. An electrical transformer is removably located in the collar, and the collar is closed by a removable cap. A loudspeaker device is disposed within the housing proximate the open end of the housing and is oriented to radiate sound waves outwardly of the housing through the open end.

REFERENCES:
patent: 3892930 (1975-07-01), Wieder
patent: 3912865 (1975-10-01), Seebinger

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