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Pole-zero determination of the vocal-tract transfer function

: Liedtke, C.E.

IEEE transactions on audio and electroacoustics 18 (1970), No.4, pp.394-398
ISSN: 0096-3518
ISSN: 0018-9278
ISSN: 0096-1620
ISSN: 1053-587X
International Seminar on Digital Processing of Analogue Signals <1970, Zürich>
Conference Paper, Journal Article
Fraunhofer HHI ()
acoustic analysis; computer aided analysis; poles and zeros; speech; speech analysis; transfer functions; vocal tract; transfer function; pole-zero determination; frequency variation; bandwidth variation; accurate evaluation; computing system

This paper describes an effort in the accurate estimation of the pole- and zero-location (frequency and bandwidth). The procedure is performed by an appropriate computer program. As the spectrum is plotted on a computer display, the human operator is given the possibility to mark areas of interest by light pen. From the spectrum a first estimate of the frequency and bandwidth is evaluated by calculating the maximum (or minimum) of the transfer function in a given area and the width of its 3-dB slope. A subsequent variation of the frequency and bandwidth leads to an accurate evaluation of the pole or zero location in the s-plane. The variation strategy used by the computer and results are presented.