Method and apparatus for determining and indicating direction and type of sound
First Claim
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1. A method of source direction determination a remote sound source, comprising:
- a. receiving at a plurality of locations sound generated from the remote sound source;
b. determining time differences of arrival by determining differences in time between the sound received at each pair of the plurality of locations;
c. associating with each of the time differences of arrival between each pair of the plurality of locations a half-plane from which the sound originated;
d. determining the source direction by an intersection of the half-planes.
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Abstract
A method and apparatus for determining the direction of a sound source is disclosed. The method includes determining time differences of arrival of the sound at N locations and using the differences to determine the angular direction of the source. The apparatus indicates the angle of arrival and additionally indicates the type of the sound source.
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Citations
20 Claims
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1. A method of source direction determination a remote sound source, comprising:
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a. receiving at a plurality of locations sound generated from the remote sound source; b. determining time differences of arrival by determining differences in time between the sound received at each pair of the plurality of locations; c. associating with each of the time differences of arrival between each pair of the plurality of locations a half-plane from which the sound originated; d. determining the source direction by an intersection of the half-planes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of indicating a direction of a sound source relative to an automobile, comprising:
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a. receiving, at a plurality of microphones attached to the automobile, sound originating from the sound source; b. determining the direction of the sound source from signals received at the plurality of microphones; c. providing a visual indication of the direction of the sound source to a driver of the automobile. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A system for determining a direction of a sound source relative to a automobile, comprising:
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a. a plurality of separately located microphones attached to the automobile for receiving sound from the sound source; b. a processor for receiving electronic representations of the received sound from each of the plurality of microphones, and determining time differences of arrival of the received sound between each of the microphones, and determining the direction of the sound source from the time differences of arrival; c. a display controllable by the processor to provide an indication of the direction of the sound source. - View Dependent Claims (18, 19, 20)
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Specification