Method of and apparatus for controlling sound field through array speaker
First Claim
1. A method of controlling a sound field, the method comprising:
- calculating a coefficient of a filter that controls sound pressure of an input signal, based on a sound pressure ratio of a suppression area that suppresses sound emitted from an array speaker and/or an emphasis area that emphasizes the sound, and sound pressure efficiency in the emphasis area;
generating a plurality of output signals that focuses the sound to the emphasis area by filtering the input signal based on the calculated coefficient of the filter; and
outputting a sound field controlled sound based on the generated plurality of output signals.
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Abstract
Provided are a method and apparatus for controlling a sound field through an array speaker. The method includes calculating a coefficient of a filter that controls sound pressure of an input signal, based on a sound pressure ratio of a suppression area that suppresses sound emitted from an array speaker and an emphasis area that emphasizes the sound, and sound pressure efficiency in the emphasis area, generating a plurality of output signals that focuses the sound to the emphasis area by filtering the input signal based on the calculated coefficient of the filter, and outputting a sound field controlled sound based on the generated plurality of output signals. Accordingly, a listener in a predetermined direction and distance from the array speaker can clearly hear sound, without wearing an earphone or a headset so as to focus the sound only to the listener.
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Citations
17 Claims
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1. A method of controlling a sound field, the method comprising:
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calculating a coefficient of a filter that controls sound pressure of an input signal, based on a sound pressure ratio of a suppression area that suppresses sound emitted from an array speaker and/or an emphasis area that emphasizes the sound, and sound pressure efficiency in the emphasis area; generating a plurality of output signals that focuses the sound to the emphasis area by filtering the input signal based on the calculated coefficient of the filter; and outputting a sound field controlled sound based on the generated plurality of output signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus for controlling a sound field for an array apparatus, the apparatus comprising:
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a filter coefficient calculator, which calculates a coefficient of a filter that controls sound pressure of an input signal, based on a sound pressure ratio of a suppression area that suppresses sound emitted from the array speaker and an emphasis area that emphasizes the sound, and sound pressure efficiency in the emphasis area; a signal generator, which generates a plurality of output signals that focuses the sound to the emphasis area by filtering the input signal based on the calculated coefficient of the filter; and the array speaker, which outputs a sound field controlled sound using the generated plurality of output signals. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification