Noise eliminating apparatus, echo cancelling apparatus, noise detection device and noise removal method

摘要

In the conventional noise reduction apparatus, noise reduction is required by utilizing the volume difference between the acoustic sensors, and a large distance between the acoustic sensors is required, so that the apparatus becomes large.The noise canceling apparatus of the present invention is an acoustic sensor array including two or more acoustic sensors, and the acoustic sensor is arranged so that the direction of the vertical bisector of the line segment connecting two adjacent acoustic sensors is in the direction of arrival of noise, and the estimation of the direction of arrival of noise is performed with high accuracy. High noise rejection performance can be realized while keeping the interval of the acoustic sensor small.