Spherical loudspeaker enclosure

Claim 2

An enclosure and loudspeaker combination comprising a molded foamed plastic shell having a hollow interior, the inner surface of which is porous and each cross section of which is a continuous curve, and having an aperture therethrough for mounting a loudspeaker of complementary dimensions to the dimensions of such aperture; and means for attaching said loudspeaker in said aperture to seal said aperture; the diameter of said loudspeaker and its limits of mechanical excursion being matched to the volume V of the interior of said shell according to the formula: V=[MD].sup.3 where M is the distance between the limits of the mechanical excursion of the diaphram of said loudspeaker and D is the diameter of the loudspeaker; so that pressure changes caused by excursions of the diaphram of said loudspeaker are equalized on the interior of said shell.

Claim 3

An enclosure and loudspeaker combination according to claim 1 further including an outer cabinet wherein said molded foamed plastic shell is within said outer cabinet, so that said outer cabinet provides structural rigidity to said combination and is of a shape independent of the shape of the interior of said foamed plastic shell.

Claim 4

An enclosure and loudspeaker combination according to claim 1 wherein said molded shell has a hollow spherical interior.

Claim 5

The combination according to claim 1 wherein said foamed plastic shell is formed of foamed plastic having a discrete closed cellular structure of a density in the range of two to four pounds per cubic foot.

Claim 6

The combination according to claim 4 wherein said foamed plastic shell is made of polyurethane foam.

Claim 7

An enclosure and loudspeaker combination comprising a molded foamed plastic shell made of foamed plastic having a discrete closed cellular structure of a density in the range of two to four pounds per cubic foot and having a hollow interior, each cross section of which is a continuous closed curve, and having an aperture therethrough for mounting a loudspeaker of complementary dimensions to the dimensions of such aperture; and means for attaching said loudspeaker in said aperture to seal said aperture; where the volume V of the interior of said shell is determined according to the formula: V=[MD].sup.3 where M is the distance between the limits of mechanical excursion of the diaphragm of said loudspeaker and D is the diameter of the loudspeaker; and an outer cabinet around said shell providing structural rigidity to the combination and having a shape independent of the shape of the interior of said shell.

Claim 8

An enclosure and loudspeaker combination comprising a molded foamed plastic shell made of foamed plastic having a discrete closed cellular structure of a density in the range of two to four pounds per cubic foot and having a hollow interior, each cross section of which is a continuous closed curve, and having an aperture therethrough for mounting a loudspeaker of complementary dimensions to the dimensions of such aperture; and means for attaching said loudspeaker in said aperture to seal said aperture; where the volume V of the interior of said shell is determined according to the formula: V=[MD].sup.3 where M is the distance between the limits of mechanical excursion of the diaphragm of said loudspeaker and D is the diameter of the loudspeaker; and an outer cabinet around said shell providing structural rigidity to the combination and having a shape independent of the shape of the interior of said shell.

Claim 9

The combination according to claim 6 wherein said shell is made of polyurethane foam.

Claim 10

The combination according to claim 6 wherein said shell has a hollow spherical interior.