Implications of the variety of bat echolocation sounds for understanding biosonar processing
Implications of the variety of bat echolocation sounds for understanding biosonar processing
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DOI：
10.1121/1.4754907
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发表时间：
2012-09
影响因子：
2.4
通讯作者：
J. Simmons;M. Hoffmann-Kuhnt;T. Leong;S. Hiryu;H. Riquimaroux;J. Knowles;C. Moss
中科院分区：
文献类型：
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作者：
J. Simmons;M. Hoffmann-Kuhnt;T. Leong;S. Hiryu;H. Riquimaroux;J. Knowles;C. Moss
不同种类的蝙蝠使用的回声定位声音的多样性对目标测距具有影响。在各个地点记录的信号揭示了不同频段中堆积的物种，这或许是为了避免交叉干扰。搜索级信号包括短的单谐波或多谐波音频突发，或非常浅的调频突发。这些窄带声音突然开始，可引起记录回声延迟的相位响应，但敏锐度有限。其他蝙蝠用于搜索的更宽的调频扫描会引起更多频率的响应，以获得更好的延迟敏锐度。这些声音类型可能意味着在开阔的、由树木或地面相对较远的广阔空间内觅食。广播之间的间隔与由与大气衰减相关的场景边界设定的生物声纳工作范围一致。大多数物种在拦截期间通过增加 FM 扫描宽度或添加谐波来过渡到更宽的信号带宽。此外，宽带、多谐波...
The variety of echolocation sounds used by different species of bats have implications for target ranging. Signals recorded at individual sites reveal species stacked in different frequency bands, perhaps to avoid cross-interference. Search-stage signals include short single-harmonic or multi-harmonic tone-bursts, or very shallow FM bursts. These narrowband sounds have abrupt onsets to evoke phasic on-responses that register echo delay, but with limited acuity. Wider FM sweeps used for searching by other bats evoke on-responses at many more frequencies for better delay acuity. These sound types may signify foraging in the open, within broad spaces bounded relatively remotely by trees or the ground. Intervals between broadcasts are consistent with biosonar operating ranges set by the boundaries of the scene in relation to atmospheric attenuation. Most species make transitions to wider signal bandwidth during interception by increasing FM sweep-width or adding harmonics. Additionally, wideband, multi-harmon...