Reverberation of rapid and slow trills: Implications for signal adaptations to long-range communication
Reverberation of rapid and slow trills: Implications for signal adaptations to long-range communication
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DOI：
10.1121/1.1539050
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发表时间：
2003-03-01
影响因子：
2.4
通讯作者：
Naguib, M
中科院分区：
文献类型：
--
作者：
Naguib, M
动物中的许多声学信号包括颤音，即，相似元素的快速重复。这些颤音中的元素通常是频率调制的，并且在长距离传输期间通过混响而退化。混响主要影响具有相同频率特性的连续元素，因此在包含颤音的远程信号的设计和感知的演变中施加了主要约束。本文研究了具有不同重复频率的非调频颤音的传输。以不同频率产生颤音以评估频率。混响的依赖性，然后在三个声学条件下广播-N开放的领域，并评估传输特性的季节性变化，落叶林前。在树叶出现之后。在颤音内的不同位置处对混响进行量化。结果表明，植被密度（季节）、传输距离、频率、元素重复率和颤音内元素位置对混响效果有很大影响。实验表明，快速颤音的传输效果不如慢速颤音，因此在远距离通信中效果较差。他们特别表明，颤音上的选择不应该只作用于颤音内的元素重复率，而且还对颤音持续时间的混响效果增加与颤音持续时间。(C)2003年，美国声学学会。
Many acoustic signals in animals include trills, i.e., rapid repetitions of similar elements. Elements within these trills usually are frequency modulated and are degraded, by reverberation during long-range transmission. Reverberation primarily affects consecutive elements with the same frequency characteristics and thus imposes a major constraint in the evolution of design and perception of long-range signals containing trills. Here transmission of frequency-unmodulated trills with different element repetition rates was studied. Trills,were generated at different frequencies to assess frequency. dependence of reverberation and then broadcast under three acoustic conditions-n open field and to assess seasonal changes in transmission properties, a deciduous forest before. and after foliage had emerged. Reverberation was quantified at different positions within trills. The results show strong effects of vegetation density (season), transmission distance; frequency, element repetition rate, and element position within the, trill on effects of reverberation. The experiments indicate that fast trills transmit less well than slow trills and thus are less effective in long-range communication. They show in particular that selection on trills should not act only on element repetition rate within trills but also on the trill duration as effects of reverberation increased with trill duration. (C) 2003 Acoustical Society of America.