Spherical loudspeaker enclosure
OwnerMichael Jacksoninventor
Life of this patent
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Abstract
A loudspeaker enclosure of the acoustic suspension type has a hollow interior of a generally spherical shape, and the enclosure is formed of polyurethane foamed plastic in which the volume (V) of the enclosure interior is determined according to the following empirical formula: V=[MD].sup.3 where M is the distance between the limits of mechanical excursion of a given loudspeaker mounted in an aperture in the enclosure as the diaphragm of the speaker is moved under a constant mechanical force, and D is the diameter of the loudspeaker.
Claims8
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.
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.
Dependencies are inferred from the claim text.