Acoustics – Diaphragm and enclosure – Recessed
Patent
1981-02-25
1982-11-02
Hix, L. T.
Acoustics
Diaphragm and enclosure
Recessed
181155, 181156, H04R 128, H05K 500
Patent
active
043568815
ABSTRACT:
A self-contained loud speaker for installation below the floor level is placed in an enclosure which is fitted in a hole in the floor. The bottom of the enclosure contains a jute mat and the speaker assembly is placed in the enclosure resting on the jute mat. The speaker assembly has a sound deflecting nose cone in a bottom portion and a speaker in a top portion. The sound from the speaker is directed downwardly toward the nose cone. The nose cone deflects the sound upwardly to above the floor level. A perforated baffle covers the front of the speaker and protects it from damage. The back of the speaker is covered by a can which also protects the speaker from damage. The sides of the can have louvres to permit the sound to pass out through the back of the can and to relieve back pressure on the speaker. The speaker is spaced above the nose cone by peripheral spacers at flanged edges of the baffle and the speaker can and at the flanged edge of the nose cone portion. The speaker assembly is contained in the floor enclosure. The floor enclosure has flanges which retain it in place in a floor. The floor enclosure is covered by a floor grill, which has openings to allow sound to travel through the grill to the space above the floor.
REFERENCES:
patent: 3056847 (1962-10-01), Breisch
patent: 3108653 (1963-10-01), Valldeperas
patent: 3746125 (1973-07-01), Hammes
patent: 3912866 (1975-10-01), Fox
Audio Engineering, Oct. 1949, pp. 18-19.
Hix L. T,.
Tarcza Thomas H.
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