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Method and device for localization of sound source by microphone

A technology for the location of microphones and sound sources, used in positioning, measuring devices, instruments, etc., can solve problems such as limitations, and achieve the effect of reducing the number of array elements

Inactive Publication Date: 2007-04-25
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of this type of sound source localization is limited in equipment with limited volume

Method used

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  • Method and device for localization of sound source by microphone
  • Method and device for localization of sound source by microphone
  • Method and device for localization of sound source by microphone

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Embodiment Construction

[0032] Embodiments of preferred modes for carrying out the present invention will be specifically described below with reference to the accompanying drawings. Details and functions that are unnecessary to the present invention have been omitted during the description to prevent obscuring the understanding of the present invention.

[0033] Fig. 1 is a schematic diagram of signals received by an array composed of two microphones according to the present invention. Firstly, a schematic diagram of an array composed of two microphones receiving sound signals will be described with reference to FIG. 1 . In FIG. 1, a person is used as an example of a sound source for illustration. It should be understood that other emitted sounds may be such as audio equipment. The sound signal emitted by a person is converted into an electrical signal through the microphone 1 and the microphone 2 . The sound signal reaching microphone 1 can be represented by x 1 (t) indicates that the sound sig...

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Abstract

A method for positioning the location of sound source is disclosed that includes steps: the receiving device receives the sound signal generated by the sound source; provisional estimates the time difference of said sound signals reaching the receiving device; provisional estimates the receiving device separately receives the energy ratio of said sound signals; ascertains the location of the sound source by the time difference and the energy ratio. The method of double micro sound localization is compared to people's double ears position mechanism; the position is located by the sound energy and the time-delay information simultaneously, it can reach the aim of reducing the number of matrix element, and doesn't need to send and receive the type-specific reference signal.

Description

technical field [0001] The invention relates to a method and a device for locating a sound source by using a microphone. In particular, the method and device for localizing a sound source by using two microphones are suitable for use in equipment with a small internal space. Background technique [0002] Using a microphone to locate a sound source is to use a microphone array to locate the position of a sound source that emits a sound. The so-called microphone array refers to a device in which multiple microphones are placed in different spatial positions to form a specific receiving system. [0003] Localization technology using microphone arrays has a wide range of applications in our current society. For example, in video conferencing, sound source localization is used to detect the position of the speaker and automatically focus the camera. The microphone array in the hearing aid is used as a pre-processing system for speech enhancement. It detects the position inform...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/18G01S5/22
Inventor 崔玮玮魏建强
Owner PANASONIC CORP
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