Abstract:
PURPOSE: A microphone array system for measuring a rotary noise source and a method for measuring a rotary noise source using a microphone array are provided to reduce the required amount of sensors by obtaining the noise data of a large amount of measurement points using the limited amount of microphones. CONSTITUTION: A microphone array system(100) for measuring a rotary noise source comprises a reference microphone(110), a rotary plane(125), a microphone array(120), an optical sensor(130), and an analyzing unit(140). The reference microphone measures noise at an arbitrary fixed point. The rotary plane is movable around an arbitrary rotary shaft. The microphone array is arranged on the rotary plane and is composed of multiple movable microphones(121). The optical sensor is fixed to the position of the central shaft of a noise source and acquires a pulse signal. The analyzing unit calculates the rotation speed and the position of the noise source.
Abstract:
The present invention relates to a regular polyhedron microphone array device and a method for measuring a noise source in a three-dimensional space by using a regular polyhedron microphone array device. The purpose of the present invention is to provide the regular polyhedron microphone array device, which has high industry properties as the regular polyhedron microphone array device is simply manufactured than an existing circular array and has affordable costs, and the method for measuring a noise source in a three-dimensional space by using a regular polyhedron microphone array device. The polyhedron microphone array device can obtain accuracy corresponding to the circular array when three-dimensionally measuring the noise source.