METHOD FOR ESTIMATING DIRECTION OF INCIDENCE OF SOUND SOURCE USING SPHERICAL MICROPHONE ARRAYS

摘要

The present invention relates to a method for estimating an incident direction of a sound source. A method for estimating an incident direction of a sound source using a spherical microphone array according to the present invention comprises: receiving a signal incident on a spherical microphone array arranged on a spherical surface, and converting the received signal into a frequency domain; Calculating a direction matching coefficient for each frequency of the received signal; Generating a spherical harmonic covariance matrix for each frequency using the direction harmonic coefficient; Extracting a signal eigenvector by applying eigenvalue decomposition to the covariance matrix; Substituting the signal eigenvector into a sine function-based ignition equation to calculate a matrix representing information on an incident direction of a sound source; And calculating eigenvalues by applying eigenvalue decomposition to the matrix and estimating the direction of the sound source.