Investigating cellular vibrations in the cochlea using the continuous wavelet transform and the short-time Fourier transform

Author

Teich, Malvin C. ; Heneghan, Conor ; Khanna, Shyam M. ; Ulfendahl, Mats

Author_Institution

Dept. of Electr. Eng., Columbia Univ., New York, NY, USA

fYear

1994

fDate

3-6 Nov 1994

Abstract

The Continuous Wavelet Transform (CWT) and the Short-Time Fourier Transform (STFT) are used to analyze the time course of cellular motion in the guinea-pig inner ear. The velocity responses of individual auditory cells (outer hair cells and Hensen´s cells) to amplitude-modulated (AM) acoustical signals display characteristics typical of nonlinear systems. such as harmonic generation. Nonlinear effects are particularly pronounced at the highest stimulus levels, where half-harmonic, and sometimes quarter-harmonic, components are also seen. Both the CWT and the STFT are found to be useful in analyzing these velocity responses

Keywords

Fourier transforms; cellular biophysics; ear; vibrations; wavelet transforms; Hensen´s cells; amplitude-modulated acoustical signals; auditory cells velocity response; cellular motion time course; cellular vibrations; cochlea; continuous wavelet transform; guinea-pig inner ear; nonlinear systems; outer hair cells; short-time Fourier transform; Auditory displays; Continuous wavelet transforms; Ear; Fourier transforms; Frequency conversion; Hair; Motion analysis; Nonlinear systems; Wavelet analysis; Wavelet transforms;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 1994. Engineering Advances: New Opportunities for Biomedical Engineers. Proceedings of the 16th Annual International Conference of the IEEE

Conference_Location

Baltimore, MD

Print_ISBN

0-7803-2050-6

Type

conf

DOI

10.1109/IEMBS.1994.412132

Filename

412132