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US 4,392,548 AGranted
Speaker enclosure and method of producing same
AssigneeEngineering Development Company
InventorGary C. Bailey
Life of this patent
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AssigneeEngineering Development Company
InventorGary C. Bailey
Estimating the term…
An improved speaker enclosure apparatus re-radiates biphase sound emanating from a speaker supported therein. When connected to receive a differential sound signal, the sound produced complements the direct sound radiating from "right" and "left" speakers. The enclosure is of compliant material, such that at low frequencies the entire enclosure expands and contracts with the expansion and contraction of the speaker diaphragm, responsive to volume expansion and contraction of the air enclosed in the enclosure. At high frequencies, only thinned portions of the enclosure expand and contract, responsive to the higher frequency sound wavefronts emanating from the speaker. The ability to mold the enclosure and the thinned portions provides a method of controlling the radiated wavefront to a desired shape to be propagated into the listening environment.
An improved speaker enclosure for re-radiating biphase sound radiating from a speaker supported and enclosed therein, comprising speaker mounting and enclosing means for combining and re-radiating back and front of speaker sound in a predetermined radiation pattern, back of speaker sound re-radiating means comprised of compliant material, said sound re-radiating means comprising a plurality of substantially airtight panels, connectable to a speaker so as to extend about and enclose the speaker in substantially airtight relationship, each panel including a high audio frequency wavefront transmitting portion, and means for elastically sealing and securing the plurality of panels to each other.
In combination with a stereo system having right and left audio channels, an improved speaker enclosure comprising:
A new use of expanded polystyrene foam comprising the method of use steps of:
Dependencies are inferred from the claim text.