Assessment of Simultaneous Calibration for Positions, Orientations, and Time Offsets in Multiple Microphone Arrays Systems

This paper verify the performance of the method of calibrating their positions, orientations, and time offsets using observations with multiple microphone arrays and estimating the sound source positions in the real environment. The conventional method calculates the orientation and time offset independently, and it is difficult to correct the solution when one of the optimizations cannot be performed well. Therefore, a method was proposed that can simultaneously estimate the position, orientation, and time offset by combining two types of objective functions. We evaluate the effectiveness of this simultaneous optimization through numerical simulations and experiments with recorded acoustic signals. As a result, it was shown that the proposed method is effective under the condition that the input error is small.