Sound discrimination method and apparatus

A sound wave, sound source technology, applied in the field of sound identification method and device, sound pickup and reproduction, can solve the performance problems of cellular phones, normal phones and speaker phones, etc.

Active Publication Date: 2013-07-17
BOSE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Cellular, normal, and speakerphones may have performance issues when there is a lot of background noise

Method used

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  • Sound discrimination method and apparatus
  • Sound discrimination method and apparatus
  • Sound discrimination method and apparatus

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Embodiment Construction

[0062] For some sound applications (eg amplification of live music, sound recording, cellular telephones and speakerphones) a microphone system with a special set of directivities is required. A new microphone system with these properties is disclosed that avoids many of the typical problems of directional microphones, while providing improved performance. This new microphone system uses the pressure measured by two or more spaced apart microphone elements (transducers) to produce a signal from a sound source that falls within a certain acceptance window relative to the distance and angle of the microphone system from all other sound sources. The relative positive gain to which the source signal's gain is compared.

[0063] These goals are achieved by microphone systems that have very different directivity patterns than conventional microphones. New microphone systems with this graph accept sound only within the "acceptance window". Accepts sounds originating within a certai...

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Abstract

A method of distinguishing sound sources includes the step of transforming data, collected by at least two transducers which each react to a characteristic of an acoustic wave, into signals for each transducer location. The transducers are separated by a distance of less than about 70 mm or greater than about 90 mm. The signals are separated into a plurality of frequency bands for each transducer location. For each band a comparison is made of the relationship of the magnitudes of the signals for the transducer locations with a threshold value. A relative gain change is caused between those frequency bands whose magnitude relationship falls on one side of the threshold value and those frequency bands whose magnitude relationship falls on the other side of the threshold value. As such, sound sources are discriminated from each other based on their distance from the transducers.

Description

technical field [0001] The present invention relates generally to the field of acoustics, and in particular to sound pickup and reproduction. More specifically, the present invention relates to voice recognition methods and devices. Background technique [0002] At a typical live concert, multiple microphones (pickup devices) are placed close to each of the instruments and vocalists. The electrical signals from the microphones are mixed, amplified and reproduced by loudspeakers so that the musicians can be heard clearly by the audience in the large performance space. [0003] A problem with conventional microphones is that they respond not only to the desired instrument or voice, but also to other nearby instruments and / or voices. For example, if the sound of a drum kit bleeds into the lead vocal's mic, the reproduced sound is adversely affected. This problem also occurs when musicians record their music in the studio. [0004] Conventional microphones also respond to mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R3/00G10L21/0208
CPCH04R1/406G10L21/02H04R29/004G10L2021/02161
Inventor W·R·肖特
Owner BOSE CORP
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