Fuzessery Z M, Pollak G D
Science. 1984 Aug 17;225(4663):725-8. doi: 10.1126/science.6463649.
The mustache bat emits a three-harmonic echolocation pulse. At the external ear, large interaural intensity differences are generated only when a sound originates within a limited area of two-dimensional space, and this area is different for each pulse harmonic. As a consequence, the external ear generates pronounced binaural spectral cues containing two-dimensional spatial information. This information is encoded in the inferior colliculus by neurons tuned to one of the harmonics and sensitive to interaural intensity differences.
髯蝠发出一种三谐波回声定位脉冲。在外耳处，只有当声音起源于二维空间的有限区域时，才会产生较大的双耳强度差异，并且每个脉冲谐波的这个区域都不同。因此，外耳会产生包含二维空间信息的明显双耳频谱线索。这些信息在下丘中由调谐到其中一个谐波并对双耳强度差异敏感的神经元进行编码。
