Method and device for noise reduction control using microphone array

A noise reduction device using a microphone array, comprising:

• a microphone array for collecting acoustic signals;
• a filtering control unit for determining incidence angles of all acoustic signals collected by the microphone array, conducting a statistics on signal components based on the incidence angles and then determining a control from a ratio of noise components according to the statistical result and using the parameter α as a control parameter for updating an adaptive filter;
• an adaptive filter for filtering out noises from the collected acoustic signals;
• wherein the filtering control unit distinguishes between target speech components and noise components based on the incidence angles, wherein the target speech components have incidence angles within an angle of protection, wherein the noise components have incidence angles outside the angle or protection;
• wherein the more noise components, the larger the control parameter α, and the faster the updating of the adaptive filter,
• wherein when all the collected acoustic signals are noise components, α is determined to be 1, and the adaptive filter conducts the fastest update to suppress noise, and
• wherein when all the collected acoustic signals are target speech components, α is determined to be 0, and the adaptive filter stops updating weights of the filter to protect the target speech components from being damaged.