| 摘要 |
PURPOSE: A system for determining an angle of incidence at a sound source is provided to install at a small space and to offer an easy and a cost effective installation by combining one array sensor and device for determining the angle of incidence. CONSTITUTION: A system for determining an angle of incidence at sound source includes a plurality of mikes(21-26) installed with facing a directional pattern to an X axis, a -X axis, a Y axis, a -Y axis, a Z axis and a -Z axis, a sensor array(11) installed by placing centers thereof on a central point of the XYZ coordinate system and fixing along the X axis, the Y axis or the Z axis, a plurality of analog-to-digital(A/D) convertors(27-32) for converting sound signals from the mikes(21-26) to digital sound signals, a number of frequency analyzers(33-38) for analyzing spectrums of the digital signals outputted from the A/D convertors(27-32), a directional data base(40), a beam forming member(41) for rotating the directional pattern of the sensor array(11) and a main processor(39). The main processor(39) determines the incidence angle of the sound source based on the spectrums inputted from the frequency analyzers(33-38) and rotates the directional patterns of the sensor array(11) by the incidence angle by the beam forming member(41).
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