Abstract
In traditional stereo recording methods which are based on the design of mechanical structure to generate omnidirectional, dipole and cardioid shotgun microphone, such as Mid-Side stereo recording and X-Y stereo recording. In general, the size of shotgun microphones is relatively large. Therefore, the MEMS microphone benefited from its small size and capability are used in this research to construct a novel stereo recording system. With MEMS microphones arranged into different array format, different beamforming algorithms are able to generate two directivity patterns at designed angles of mainlobe for the left and right channels. The proposed designs including broadside array, coupled array, decoupled array and curved array recording design are evaluated by objective, subjective, and mismatch tests. Throughout performance evaluations, we know that the recording performance by the MEMS microphone array with specific algorithms is the same as, even better than, that by shotgun microphones. Especially, the broadside array and curved array designs yield the highest recording performance in silent and noisy circumstances, respectively.