Microphone array sound source location system with imaging overlay
First Claim
1. A sound source locating system for determining a location of a sound source, comprising:
- at least three microphones arranged two-dimensionally in two pairs, one of said two pairs being arranged on a first line, the other of said two pairs being arranged on a second line crossing the first line,means of estimating the location of the sound source from a ratio of phase differences or arrival time differences of arrival sound between the two pairs of the microphones,means of picking up an image around the location of the sound source, andmeans of displaying the location of the sound source on the image.
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Accused Products
Abstract
In order to locate and display the source of a sound such as a noise at a factory or the like accurately even when it is outside, a pair of microphones (M1, M3) and another pair of microphones (M2, M4) are disposed on the X axis and Y axis with a distance L therebetween, respectively, the direction of the sound source is estimated from a difference between sound arrival times to the microphones (M1, M3) and a difference between sound arrival times to the microphones (M2, M4), an image around the estimated location of the sound source is picked up by a camera, and the above estimated location of the sound source is displayed on the above image displayed on the display of a personal computer.
41 Citations
13 Claims
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1. A sound source locating system for determining a location of a sound source, comprising:
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at least three microphones arranged two-dimensionally in two pairs, one of said two pairs being arranged on a first line, the other of said two pairs being arranged on a second line crossing the first line, means of estimating the location of the sound source from a ratio of phase differences or arrival time differences of arrival sound between the two pairs of the microphones, means of picking up an image around the location of the sound source, and means of displaying the location of the sound source on the image. - View Dependent Claims (2, 8, 9, 10, 11, 12, 13)
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3. A sound source locating system for determining a location of a sound source, comprising:
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at least four microphones arranged threedimensionally, at least three microphones of said at least four microphones being arranged on a common plane in two pairs, at least one microphone of said at least four microphones being arranged away from the common plane, one of said two pairs being arranged on a first line, the other of said two pairs being arranged on a second line crossing the first line, means of estimating the location of the sound source from a ratio of phase differences or arrival time differences of arrival sound between the two pairs of the microphones and phase differences or arrival time differences of arrival sound between the at least three microphones on the common plane and the at least one microphone away from the common plane, means of picking up an image around the estimated location of the sound source, and means of displaying the estimated location of the sound source on the picked up image. - View Dependent Claims (4, 5, 6, 7)
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Specification