Acoustics – Plural diaphragm sound sources – Plural chambers
Patent
1985-06-12
1986-05-27
Fuller, Benjamin R.
Acoustics
Plural diaphragm sound sources
Plural chambers
181146, 181148, 181150, 181151, 181153, 181199, H05K 500
Patent
active
045910200
ABSTRACT:
A multi-chamber loudspeaker enclosure comprises a primary chamber having a principle interior volume and a secondary chamber having a minor interior volume substantially smaller than the principal interior volume. The secondary chamber comprises an elongated housing mounted to a front wall of the primary chamber. The secondary chamber has a speaker mounting opening from the enclosure and an interior opening that opens simply and directly from the secondary chamber into the primary chamber. The two openings are substantially coaxially aligned. The speaker mounting opening is the only opening from the inside of the enclosure to its exterior. The secondary chamber projects from one of the faces of the front wall of the primary chamber. The length of the secondary chamber between the two openings is substantially greater than the length of a loudspeaker mountable in the speaker mounting opening. This multichamber loudspeaker enclosure has enhanced freedom from resonance. A loudspeaker enclosure especially suitable for enhancing bass response is provided by a secondary chamber housing of large mass in which the walls are formed from a dense, solid material that inhibits physical motion or vibration being transmitted to the walls of the enclosure from vibrations induced in the loudspeaker during its operation.
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