Patent ID: 8369550
Filing Date: 2013-02-05
Classification: H04R,H04S

Abstract:
1. A method for detecting the direction of a sound source, comprising: inputting sound signals from a sound source to a plurality of microphones wherein a structure is located between the plurality of microphones; measuring respective output signals from the plurality of microphones in response to the input sound signals; determining whether the sound source is in front of or behind the structure, based on the difference between amplitudes of the respective output signals caused by the structure; and determining an angle corresponding to the position of the sound source from a difference between delay times of the respective output signals, wherein in the determining whether the sound source is in front of or behind the structure, when G and an inter-channel level difference (IcLD) is defined as follows: wherein, in the determining whether the sound source is in front of or behind the structure, the position of the sound source is determined as a front with respect to a line passing through the first and second microphones when the IcLD is greater than zero, and the position of the sound source is determined as a back with respect to the line passing through the first and second microphones when the IcLD is smaller than zero.