Context-dependent effects of noise on echolocation pulse characteristics in free-tailed bats.
Context-dependent effects of noise on echolocation pulse characteristics in free-tailed bats.
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DOI：
10.1007/s00359-009-0468-x
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发表时间：
2009-10
影响因子：
2.1
通讯作者：
Smotherman, Michael S.
中科院分区：
文献类型：
--
作者：
Tressler, Jedediah;Smotherman, Michael S.
背景噪音在不同种类的脊椎动物的交流叫声的声学结构中唤起了类似的适应性。回声定位蝙蝠可能已经进化出专门的声音策略来在噪音中进行回声定位，但似乎也表现出一般的脊椎动物反应，比如无处不在的伦巴第反应。我们想知道蝙蝠是如何平衡对噪音的一般和回声定位特定的声音反应的。为了解决这个问题，我们首先描述了飞行的无尾蝙蝠（Tadarida brasiliensis）对振幅变化的宽带噪声的声音反应。其次，我们测量了蝙蝠对带宽有限的噪音的反应，这些噪音与它们的回声定位脉冲带宽的重叠程度不同。我们假设蝙蝠对噪声的一般响应将与噪声幅度、总带宽和频率内容成比例地分级，因此，对带宽受限噪声的更多选择性响应（如干扰避免响应）可以通过对宽带噪声响应的线性分解来解释。相反，结果表明，声音响应的性质和幅度随输出脉冲的声学结构而变化，并与噪声参数呈非线性关系。我们得出结论，无尾蝙蝠以一种依赖环境的方式对噪音使用单独的通用和专门的声音反应。
Background noise evokes a similar suite of adaptations in the acoustic structure of communication calls across a diverse range of vertebrates. Echolocating bats may have evolved specialized vocal strategies for echolocating in noise, but also seem to exhibit generic vertebrate responses such as the ubiquitous Lombard response. We wondered how bats balance generic and echolocation-specific vocal responses to noise. To address this question, we first characterized the vocal responses of flying free-tailed bats (Tadarida brasiliensis) to broadband noises varying in amplitude. Secondly, we measured the bats’ responses to band-limited noises that varied in the extent of overlap with their echolocation pulse bandwidth. We hypothesized that the bats’ generic responses to noise would be graded proportionally with noise amplitude, total bandwidth and frequency content, and consequently that more selective responses to band-limited noise such as the jamming avoidance response could be explained by a linear decomposition of the response to broadband noise. Instead, the results showed that both the nature and the magnitude of the vocal responses varied with the acoustic structure of the outgoing pulse as well as non-linearly with noise parameters. We conclude that free-tailed bats utilize separate generic and specialized vocal responses to noise in a context-dependent fashion.
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DOI：
10.1007/s00359-006-0205-7
发表时间：
2007-04-01
影响因子：
2.1
作者：
Egnor, S. E. Roian;Wickelgren, Jeanette Graham;Hauser, Marc D.
通讯作者：
Hauser, Marc D.
影响因子：
2.8
作者：
Bates, Mary E.;Stamper, Sarah A.;Simmons, James A.
通讯作者：
Simmons, James A.
影响因子：
2.5
作者：
LOPEZ, PT;NARINS, PM;MOORE, SW
通讯作者：
MOORE, SW
DOI：
10.1016/j.rcc.2005.02.011
发表时间：
2005-06-01
期刊：
Respiratory care clinics of North America
影响因子：
--
作者：
Corne, Stephen;Bshouty, Zoheir
通讯作者：
Bshouty, Zoheir
影响因子：
2.5
作者：
Gillam, Erin H.;McCracken, Gary F.
通讯作者：
McCracken, Gary F.