Enclosed microphone array system with point-listening characteristics based on adjustment of complex weighting

A microphone array system with point-listening sensitivity characteristics is presented. To this end, a multiple microphone array with controllable gain and delay is utilized. To achieve effective point-listening characteristics, we proposed an enclosed microphone array system with a complex weighting method. In this system, both the microphone arrangement and the value of the complex weighting are important. Construction of the microphone array system and the signal-processing method are explained, and the calculation method for optimal complex weighting is also presented. A prototype experimental setup is designed and fabricated to verify the expected characteristics.