METHODS OF FREQUENCY ANALYSIS OF A COMPLEX MAMMALIAN VOCALISATION
METHODS OF FREQUENCY ANALYSIS OF A COMPLEX MAMMALIAN VOCALISATION
复制标题
复杂哺乳动物发声的频率分析方法
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
T. Dabelsteen
中科院分区：
文献类型：
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作者：
S. Darden;S. Pedersen;T. Dabelsteen
摘要 哺乳动物发声中普遍存在复杂的声学结构，这使得量化频率特性变得困难。我们描述了两种为复杂的迅狐 Vulpes velox 发声（吠叫序列）进行频率分析而开发的方法：（1）自相关函数分析和（2）瞬时频率分析。自相关函数分析产生信号平均幅度和频率信息的能量密度谱。该分析用于定位可能的共振峰结构并量化吠叫序列中单个吠叫的能量分布。瞬时频率分析应用于各个连续频带，并生成分辨率为几赫兹的频率轮廓。它用于量化频率调制并计算单个树皮中谐波频带的平均频率并估计基频。第二种分析方法必须通过光谱分析进行评估，以衡量其对每个分析波段的可靠性。所使用的算法应该使这两种方法都适用于其他复杂的发声。
ABSTRACT The prevalence of complex acoustic structures in mammalian vocalisations can make it difficult to quantify frequency characteristics. We describe two methods developed for the frequency analysis of a complex swift fox Vulpes velox vocalisation, the barking sequence: (1) autocorrelation function analysis and (2) instantaneous frequency analysis. The autocorrelation function analysis results in an energy density spectrum of the signal's averaged amplitude and frequency information. This analysis was used for locating possible formant structures and quantifying the energy distribution of single barks in the barking sequence. The instantaneous frequency analysis is applied to individual continuous frequency bands and generates frequency contours with a resolution of a couple of Hertz. It was used to quantify frequency modulation and calculate average frequencies of harmonic bands in individual barks and to estimate fundamental frequencies. This second method of analysis had to be evaluated with spectrographic analysis to gauge its reliability for each band analysed. The algorithms used should make both of these methods applicable to other complex vocalisations.
DOI：
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发表时间：
1999-10
期刊：
The Journal of experimental biology
影响因子：
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作者：
Tobias Riede;Tecumseh Fitch
通讯作者：
Tobias Riede;Tecumseh Fitch