听觉的声学现象和原理(4)

莫福源;

1:中国科学院声学研究所

摘要
<正>4.2双耳效应和立体声人有双耳绝对不仅是为了对称和美观,双耳接收声音后可以定出声源的方向和距离。声源在正前方时双耳定向精度高,声源在侧向时定向精度低;无论声源在那个方向,双耳定距离都比较差,要靠眼睛帮助。双耳定向的解释是到达两耳的强度差、时间差和相位差,低频(小于800 Hz)和高频(大于2 000Hz)时强度差起主要作用;中频时时间差(即相位差)起主要作用;因为它们的关系很复杂,实验也不
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