南京大学学报(自然科学版) ›› 2019, Vol. 55 ›› Issue (5): 804812.doi: 10.13232/j.cnki.jnju.2019.05.013
摘要:
耳机回放音频时,大脑感知到的音频的主观声场宽度受其响度级、耳间互相关系数和频率成分的影响显著.采用虚拟声学指针作为参考信号,针对响度级在60~80方,耳间互相关系数在0~1的倍频程信号进行了主观声场宽度听音实验.实验结果表明:随着响度级的提高主观声场宽度在不同频段有不同的增幅,增幅最大值在200 Hz附近,最小值在1600 Hz附近,每增加10方,平均声场宽度增幅为5.4°;随着耳间互相关系数的降低,主观声场宽度的增幅在400~800 Hz最大,耳间互相关系数每降低0.2,主观声场宽度增加约4.8°.根据实验结果建立了一个基于响度级、耳间互相关系数和中心频率的三因素主观声场宽度预测模型.验证实验表明,该模型的预测结果和听音者的实验结果误差在5.4°,符合实验的精度要求,能够对给定信号的声场宽度进行有效的预测.
中图分类号:
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