Liu Wei, Forrester Larry, Whitall Jill
Department of Physical Therapy and Rehabilitation Science, School of Medicine, University of Maryland, 100 Penn Street, Baltimore, MD 21201, USA.
J Mot Behav. 2006 Jan;38(1):18-28. doi: 10.3200/JMBR.38.1.18-28.
Finger tapping involves 3 important features: time, spatial amplitude, and frequency. In classical analysis, investigators examine timing parameters; in spectral analysis, they examine frequency parameters. Both types of analysis are based on stationary tap information. The authors propose that time-frequency analysis is a useful tool for analyzing nonstationary finger tapping. They describe the method and give examples of frequency modulation, age difference, and speed transition that demonstrate additional insights one can gain by using this analysis.
时间、空间幅度和频率。在经典分析中，研究人员检查时间参数；在频谱分析中，他们检查频率参数。这两种分析类型均基于平稳的敲击信息。作者提出，时频分析是分析非平稳手指敲击的有用工具。他们描述了该方法，并给出了频率调制、年龄差异和速度转变的示例，这些示例展示了使用这种分析可以获得的更多见解。
