Behavioural and neurobiological implications of linear and non-linear features in larynx phonations of horseshoe bats.

Behavioural and neurobiological implications of linear and non-linear features in larynx phonations of horseshoe bats.
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马蹄蝠喉部发声线性和非线性特征的行为和神经生物学意义

DOI:
10.1038/ncomms2165
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发表时间:
2012
影响因子:
16.6
通讯作者:
--
中科院分区:
综合性期刊1区
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--
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哺乳动物的发声在其光谱时间特征上表现出很大的变化,尽管目前还不清楚哪些是由喉部固有的生物力学特性造成的,哪些是由直接的神经肌肉控制的。在这里,我们展示了喉气流的变化对声音产生的非线性影响,在马蹄铁蝙蝠的孤立喉部制备中。最值得注意的是,在自然发声中用于回声定位或通信的两个频带之间有突然的跳跃。这些跳跃类似于“音域”的变化,就像在约德尔演唱中一样。相比之下,模拟喉头主肌的收缩产生线性频率变化,但仅限于回声定位或通信频率。因此,只有结合非线性和线性的特性,这个喉头才能发出覆盖自然叫声的整个频率范围的声音。这可能会给类似约德尔的发声行为带来行为学意义,并重塑我们对大脑如何控制哺乳动物众多频谱发声特征的思考。
Mammalian vocalizations exhibit large variations in their spectrotemporal features, although it is still largely unknown which result from intrinsic biomechanical properties of the larynx and which are under direct neuromuscular control. Here we show that mere changes in laryngeal air flow yield several non-linear effects on sound production, in an isolated larynx preparation from horseshoe bats. Most notably, there are sudden jumps between two frequency bands used for either echolocation or communication in natural vocalizations. These jumps resemble changes in ‘registers’ as in yodelling. In contrast, simulated contractions of the main larynx muscle produce linear frequency changes, but are limited to echolocation or communication frequencies. Only by combining non-linear and linear properties can this larynx, therefore, produce sounds covering the entire frequency range of natural calls. This may give behavioural meaning to yodelling-like vocal behaviour and reshape our thinking about how the brain controls the multitude of spectral vocal features in mammals.
DOI: 10.1007/bf00611168
发表时间: 1981-01-01
期刊: JOURNAL OF COMPARATIVE PHYSIOLOGY
影响因子: --
作者:
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通讯作者: RUBSAMEN, R
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发表时间: 1986-01-01
期刊: JOURNAL OF COMPARATIVE PHYSIOLOGY A-SENSORY NEURAL AND BEHAVIORAL PHYSIOLOGY
影响因子: --
作者:
RUBSAMEN, R;BETZ, M
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