定向偏置声场的传声器阵列多点协同记录方法OA

Accurate sound field recording serves as a fundamental prerequisite for spatial audio applications such as sound field analysis,control,and reproduction.For directionally biased sound fields commonly encountered in practice,modal decomposition based on optimal basis functions has proven to be an efficient representation approach;however,existing implementations typically rely on independent measurements using a single microphone array,which provides limited spatial information and is susceptible to noise.To address this issue,this study incorporates multi-point measurement into the optimal modal decomposition framework and proposes a distributed collaborative recording method for directionally biased sound fields.By constructing a sound field decomposition transfer matrix under multi-point constraints using the addition theorem of spherical wave functions,joint estimation of modal decomposition coefficients is achieved.Numerical simulations and experimental measurements demonstrate that,compared with single-point strategies or methods using spherical harmonic bases,the proposed method significantly reduces the relative error of reconstructed sound pressure over both the effective frequency range and the entire target listening area,thereby improving recording performance for directionally biased sound fields.