A study of time-dependent fractal dimensions of vocal sounds
A study of time-dependent fractal dimensions of vocal sounds
复制标题
声音随时间变化的分形维数研究
DOI：
10.1143/jpsj.64.3226
复制
发表时间：
1995
影响因子：
1.7
通讯作者：
M. Nakagawa
中科院分区：
文献类型：
--
作者：
S. Sabanal;M. Nakagawa
In this paper, we propose a new method to analyze the fractal properties of self-affine time-sequential data by expanding the well-known fractal dimension analysis to characterize the local dynamical fractal properties. Here we investigate the time dependence of the fractal dimensions of a time-sequential data, which we shall term the “Time-Dependent Fractal Dimensions” ( TDFD s), and analyze its characteristics. As an example of self-affine time-sequential data, we will utilize vocal sounds. The TDFD s of Japanese vowels as well as Japanese and English words are evaluated by the recently proposed critical exponent method based on the power spectra and by the multifractal analysis. As a result, one may observe that the fractal properties of vocal sounds shows a dynamical change with respect to time and it was found out that there is a certain pattern of TDFD s for each data.
