Patent ID: 9319785
Filing Date: 2016-04-19
CPC Classification: G01S,H04R

Claim Text:
1. A method for localizing a sound source, comprising: acquiring, by a controller, a sound pressure signal measured by microphones, using a spherical microphone array sensor wherein the microphones are fixedly arranged on a surface of a spherical body; obtaining a sound pressure distribution on the surface of the spherical body from a sound pressure calculation formula for calculating a sound pressure at a certain location of a spherical surface using the sound pressure signal measured by the microphones as an input value; and estimating a location of the sound source from the obtained sound pressure distribution, wherein, from Equation (1) below the sound pressure calculation formula is obtained by meeting r=a (here, a is a radius of the spherical body) and limiting a sound field distribution order n to a maximum order N of Equation (2) below that considers a total number of microphones; where j where M is a total number of microphones, and N is a maximum order.