海豚哨声的时频精细结构

[1992] Proceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis Pub Date : 1992-10-04 DOI:10.1109/TFTSA.1992.274243

P. Tyack, W. J. Williams, G. Cunningham

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引用次数: 11

摘要

数据表明，宽吻海豚的口哨声不是简单的音调信号。口哨声不仅仅是频率变化缓慢的正弦信号，而且还包括更复杂的属性，这可能与持续时间短的现象有关，可能类似于基本音调成分的快速频率调制。谱图分析无法揭示这些细微的波动。结果表明，时频分析方法，如减少干涉分布(RID)，既能揭示音调结构，也能揭示更细微的调制结构。

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Time-frequency fine structure of dolphin whistles

Data indicating that whistles of bottlenosed dolphins Tursiops truncatus are not simple tonal signals are presented. Whistles are not simply sinsoidal signals with rather slowly varying frequency contours, but also include more complex attributes, which may be related to a short-duration phenomenon, perhaps akin to a rapid frequency modulation of the basic tonal components. These subtle fluctuations are not revealed by spectrogram analysis. It is shown that methods of time-frequency analysis such as the reduced interference distribution (RID) reveal both the tonal structure and the more subtle modulation structure.<>

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[1992] Proceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis

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