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Loudspeaker Enclosure - Get as PDF

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The present invention relates to a loudspeaker enclosure.DESCRIPTION OF THE PRIOR ARTA loudspeaker is normally supported by an enclosure. Some sound energy from the loudspeaker is propagated by the enclosure resulting in undesired distortion of sound reproduced by the speaker. See for example Chapter 7 of "High PerformanceLoudspeakers" 3rd Edition, Martin Colloms, Pentech Press.SUMMARY OF THE INVENTIONThis invention is directed to the solution of the above problems of the prior art. It is therefore a general object of the invention to provide an enclosure which is capable of restraining the undesired distortion of sound reproduced b thespeaker.Under this object, a loudspeaker enclosure arranged according to this invention comprises a wall structure which includes a vacuum space.Under this object, a loudspeaker system arranged according to this invention comprises an enclosure including a wall which structure includes a vacuum space, and a loudspeaker supported by the enclosure.Other objects and features of this invention will become apparent from the following detailed description of embodiments thereof taken in connection with the accompanying drawing. BRIEF DESCRIPTION OF THE DRAWINGSFIG. 1 is a top plan view in cross-section of a loudspeaker enclosure incorporating a loudspeaker according the present invention; andFIG. 2 an end view of the enclosure of FIG. 1. DETAILED DESCRIPTION OF PREFERRED EMBODIMENTSThe enclosure comprises a wall structure having an inner wall 2 spaced from an outer wall 6 to define there between a vacuum space 5. The wall structure together with the loudspeaker at the mouth of the enclosure defines an internal space 3which contains air and/or sound damping material.The vacuum space 5 between the inner and outer walls 2 and 6 is closed by a flange 7 on the loudspeaker and an O-ring 4, the flange and O-ring being held in place by the external air pressure, once the vacuum space 5 is pumped out via port 8. Port 8 is sealed after pumping ou

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