A feedback control system for real-time formant estimation. II. Analysis of a hysteresis effect and F2 estimation

Author

Zierhofer, Clemens M. ; Hochmair, Erwin S.

Author_Institution

Inst. fuer Experimentalphysik, Innsbruck Univ., Austria

Volume

40

Issue

9

fYear

1993

Firstpage

892

Lastpage

898

Abstract

For pt.I see ibid., vol.40, no.9, pp.886-91 (1993). The feedback control system behavior is analyzed for an input signal composed of two sinusoids. If the frequency difference between the two input spectral lines is sufficiently great and the amplitude ratio is within certain limits, a hysteresis effect occurs. Then the system shows a tendency to select one of the two input spectral lines. The existence of the second line has only little influence on the accuracy of the detection of the selected line. From the analysis, conclusions of the system behavior regarding formant estimation can be drawn. A design example for second formant detection is simulated and compared with the results obtained by simulation of a zero-crossing system for F2 estimation and linear predictive coding (LPC) analysis.

Keywords

biocontrol; feedback; hearing aids; spectral analysis; speech analysis and processing; cochlear implant; feedback control system; hysteresis effect; linear predictive coding; real-time formant estimation; second formant detection; speech analysis; vowel spectra; zero-crossing system; Analytical models; Bandwidth; Control systems; Feedback control; Frequency; Frequency estimation; Hysteresis; Linear predictive coding; Predictive models; Real time systems; Signal analysis; Speech; Voltage control; Computer Simulation; Female; Humans; Models, Biological; Signal Processing, Computer-Assisted; Speech Acoustics;

fLanguage

English

Journal_Title

Biomedical Engineering, IEEE Transactions on

Publisher

ieee

ISSN

0018-9294

Type

jour

DOI

10.1109/10.245610

Filename

245610