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Directional loudspeaker to reduce direct sound

  • US 8,121,336 B2
  • Filed: 04/05/2007
  • Issued: 02/21/2012
  • Est. Priority Date: 04/05/2007
  • Status: Active Grant
First Claim
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1. A loudspeaker system for placement in an at least partially enclosed space, the space having boundary walls including a ceiling boundary wall and a side boundary wall having an openable window and at least one listener position comprising:

  • a loudspeaker element mounted to the ceiling boundary wall above a listener position; and

    means for producing an indirect sound field including an acoustic deflector positioned adjacent to the openable window and an acoustic wave guide positioned along the ceiling boundary wall and acoustically coupling the loudspeaker element to the acoustic deflector, where the indirect sound field is reflected by the acoustic deflector before reaching the listener position to produce an indirect sound field that is greater than a direct sound field at the listener position even when the openable window is in an open position.

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