H - Electricity – 04 – R
Patent
H - Electricity
04
R
181/4
H04R 1/28 (2006.01)
Patent
CA 1100884
ABSTRACT OF THE DISCLOSURE The present invention is a device for use in combin- ation with a loudspeaker system, that includes a speaker enclos- ure, in order to effectively enlarge the volume of the speaker enclosure. The loudspeaker system also includes a vibratable cone. The device for effectively enlarging the volume of the speaker enclosure includes a gas having a gamma less than 1.4 and the product of its density and the square of the speed of sound therein less than the same product for air and a bag which is formed from a soft, pliable material for enclosing the gas within the speaker enclosure and which is adapted to seal the gas therein. The device also includes an acoustically trans- parent and porous cocoon which is disposed about the bag so that it surrounds completely the bag and an acoustical padding which is disposed adjacent to the sidewalls of the speaker enclosure and which is adapted to enclose the acoustically transparent and poxous cocoon. The decive may also include a device for gener- ating the gas by heating a fluid in its liquid phase so that the fluid changes to its gas phase. The device for heating the fluid may either be a resistive electrical element which is dis- posed within the speaker enclosure or fibrous, sound absorbent material which is disposed within the bag. The device is placed in the speaker enclosure in back of the vibratable cone in order to increase the compliance that the vibratable cone sees.
313635
Cerwin-Vega Inc.
George H. Riches And Associates
LandOfFree
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