噪声环境下双耳重放信号方位角听觉定位补偿算法

A horizontal sound localization compensation algorithm for rendering binaural signals in noisy environment

针对噪声环境干扰双耳重放信号导致方位角听觉定位精度下降的问题,提出了一种基于双耳部分特定响度差的双耳重放信号听觉定位补偿算法。研究表明,双耳响度差可以作为一种听觉系统感知声源方位角的表征方式。为消除噪声环境引起的双耳重放信号响度差畸变,提高噪声环境下双耳虚拟听觉定位的精度,所提算法以安静环境下原始双耳重放信号的双耳特定响度差为目标,通过调节双耳重放信号之间相对能量大小来实现对噪声环境下双耳重放信号听觉定位的补偿。不同噪声能量、不同信噪比下的主观测听实验证明了算法的有效性,实验结果表明:噪声环境下双耳重放信号经所提算法补偿后较原始信号方位角平均定位误差降低4°。

To solve the problem that the noisy environment interferes with the binaural signals and decreases of the horizontal sound localization accuracy,a compensation algorithm for binaural signals in noisy environment based on the interaural specific loudness difference is proposed.Studies have shown that the interaural loudness difference can be used as a representation of the sound localization of the horizontal azimuth of the sound source.In order to eliminate the distortion of the interaural loudness difference caused by noisy environment and improve the sound localization accuracy in noisy environment,the proposed algorithm uses the interaural specific loudness difference of the binaural signals in quiet as target and adjusts the relative energy of the binaural signals to compensate the influence of noisy environment for the sound localization.Subjective listening experiments under different noise sound pressure levels and different signal-to-noise ratios prove the effectiveness of the algorithm.The experimental results show that the average perception error of the binaural signals compensated by the proposed algorithm is reduced by 4°compared with the original binaural signals in noisy environment.