Method and device for estimating direction of arrival (DOA) of broadband sound source

The invention relates to a method and device for estimating the direction of arrival (DOA) of a broadband sound source. The method comprises the following steps: selecting one section of sound data X(n)=[x1(n),...,xP(n)]T from sound data collected from a microphone array, wherein n is a subset of Z*; evenly dividing the selected sound data X(n) into L frames; carrying out N-point quick Fourier transform on each frame of sound data Xl (n); presenting the frequency domain of the obtained sound data as follows: Xl(k)=[xl1(k),...,xlP(k)]T, wherein k=1,..., N/2; then, calculating the modulus square value eta (k) of a coherence function between two microphones in the microphone array; randomly selecting the modulus square values of q coherence functions from the eta (k); and estimating the DOA only by using a frequency band corresponding to the modulus squares of the q coherence functions. According to the method and device, the computation amount of an algorithm is greatly lowered on the premise of ensuring that the precision is hardly lowered.