Control manner and adaptation array device null of adaptation

摘要

PROBLEM TO BE SOLVED: To provide a adaptive array which has small breathing noise and generates an output signal of high quality. SOLUTION: From a signal having its phase adjusted so as to match the phase of a component of a target signal between two sensor output signals, the result p(k) obtained by comparing 1st correlation calculated with a 1st time constant with a 1st threshold value and the result q(k) obtained by comparing 2nd correlation calculated with a 2nd time constant with a 2nd threshold value are inputted to a state circuit 60. The output of this state circuit 60 is regarded as the step size of the adaptive algorithm of an adaptive filter. The internal state of the state circuit 60 represents which of state transition due to a target signal stop or state transition due to target signal generation the next generated state transition is.