Acoustics – Diaphragm and enclosure – With sound-absorbing means
Patent
1979-12-31
1983-02-15
Fuller, Benjamin R.
Acoustics
Diaphragm and enclosure
With sound-absorbing means
181155, 181156, 181145, 181146, 181199, 181296, H05K 500
Patent
active
043736068
ABSTRACT:
Both an improved loudspeaker enclosure and an improved acoustical process for generating sound radiation in a room is herein disclosed. Basically, the walls of the improved enclosure include a loudspeaker, and a sound transmission port for transmitting sound generated by the back of the loudspeaker cone into the room. The interior of the enclosure includes a tuned acoustical chamber for absorbing the even and odd harmonics of the system resonance frequency, and a compression chamber acoustically coupled at one end to the back of the loudspeaker cone. The compression chamber is acoustically coupled to both the tuned acoustical chamber and the transmission port of the enclosure walls by means of an acoustical coupling. When the transmission port is located in the back wall of the enclosure, the sound transmitted by the transmission port may be directed into and amplified by an acoustical structure formed by the back enclosure wall, the room floor, and the room walls, where it reflects and combines with the sound radiation generated by the front of the loudspeaker cone.
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"Reflex Enclosure", Radio Electronics, Nov. 1959.
Clements Philip R.
Smith Donald R.
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