Directivity improvement of a microphone array in the vehicle cabin

• Main Authors: Huang,Chun-Chieh, 黃俊傑
• Other Authors: Tseng, Wen-Kung
• Format: Others
• Language: en_US
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/wj556r

碩士 === 國立彰化師範大學 === 車輛科技研究所 === 106 === Directional microphones are used in popular car multimedia systems, such as APPLE CAR PLAY and ANDROID AUTO. The driver can command the microphone to control the car multimedia system. The directional microphone can also improve speech recognition accuracy and prevent the microphone from receiving noise from outside the car. This research improves array microphone directivity. Delay-and-sum beamforming method is used in most systems to achieve the desired directional microphone array effect. This study uses 57 circular array microphones with delay-and-sum beamforming with the optimization method to control the directivity of the microphone array. The simulation and experimentation results show that the proposed method significantly improves microphone array directivity.