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Area-sound reproduction system and area-sound reproduction method

  • US 9,754,575 B2
  • Filed: 08/24/2016
  • Issued: 09/05/2017
  • Est. Priority Date: 08/31/2015
  • Status: Active Grant
First Claim
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1. An area-sound reproduction system, comprising:

  • a speaker array including a plurality of speakers linearly arranged side by side;

    a sound collector configured to collect an environment sound in an environment where the area-sound reproduction system is installed;

    a processor; and

    a memory having a computer program stored thereon, the computer program causing the processor to execute operations, includingadjusting signals that the plurality of speakers are caused to output as reproduced sounds according to a reproduction condition on a control line, wherein the control line includes(i) a reproduction line in which sound waves emitted from the speaker array have constructive interference with each other, and(ii) a non-reproduction line in which the sound waves have destructive interference with each other,the reproduction line and the non-reproduction line being set at a position substantially in parallel with the speaker array and apart from the speaker array by a predetermined distance, andcausing the plurality of speakers to output the reproduced sounds,wherein the adjusting further includesdetermining a noise level from the collected environment sound, andadjusting signals to be output as the reproduced sounds, such that at each frequency,a sound pressure of the reproduced sound reaching the reproduction line on the control line exceeds the noise level, anda sound pressure of the reproduced sound reaching the non-reproduction line on the control line does not exceed the noise level.

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