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Audio Signal Processing

Loudspeaker-system-and-method-for-disbursing-sounds-waves

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Loudspeaker system and method for disbursing sounds waves

Details

Inventors: Holdaway, Timothy A.;
Assignee:
Primary Examiner: Gellner; Michael L.
Assistant Examiner: Dang; Khanh
Attorney, Agent or Firm: Brooks & Kushman

A loudspeaker system 10 and a method for disbursing sound waves are disclosed. The loudspeaker system 10 has a reflector screen 12 which is provided with a concave reflective surface 14. The reflective surface 14 is a complex curve having a central axis 16. A first speaker 18 is positioned in front of the reflective surface 14 a longitudinal distance along the central axis 16 less than a pre-determined distance x. The first speaker 18 projects sound waves above a pre-determined frequency toward the reflective surface 14 to be reflected and disbursed into a listening area. A second speaker 20 is positioned to project sound waves below the pre-determined frequency into the listening area generally. A frame 24 supports the first and second speakers 18,20. A method for disbursing sound waves is also disclosed including the steps of providing a reflector screen 12 having a concave reflective surface 14 and positioning first and second speakers 18,20. The method further includes the steps of projecting sound waves from the first and second speakers 18,20 and reflecting sound waves from the first speaker 18 off of the reflective surface 14 to be disbursed into a listening area.

DETAILED DESCRIPTION According to the apparatus and method of the present invention, a reflector screen is provided having a concave reflective surface.
The reflective surface is generally symmetrical about a horizontal and a vertical plane, respectively.
These vertical and horizontal planes intersect along a central axis.
The concave reflective surface is configured such that a line drawn normal to the reflective surface at substantially any region thereon intersects both the vertical and horizontal planes at vertical and horizontal intersection points, respectively.
Substantially all of these vertical and horizontal intersection points are spaced from the reflector screen a longitudinal distance along the central axis greater than some pre-determined distance x.
A first speaker is positioned in front of the reflective surface generally along the central axis a distance less than the pre-determined distance x.
The first speaker is powered to produce sound waves above some pre-determined frequency.
These sound waves are projected toward the reflective surface to be reflected off the reflective surface and uniformly disbursed into a listening area.
A second speaker is positioned and powered such that it produces sound waves below the pre-determined frequency that are projected into the listening area generally.
Support means are also provided to support the first and second speakers relative to the reflector screen.
Accordingly, it is a principle object of this invention to provide a method and apparatus for sound reproduction that qualitatively approaches the actual sound produced during an original event.
Another object of this invention is to provide a method and apparatus for sound reproduction that is compatible with a wide variety of loudspeakers.
Another object of this invention is to provide a method and apparatus for sound reproduction that is simple in design and inexpensive to manufacture.
Another object of this invention is to provide a method and apparatus for sound reproduction utilizing reflection that eliminates distortion associated with reflection of low-frequency sound waves

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