Phase behaviour of transfer functions in vibrating systems

Jianyuan Zhu, Mogens Ohlrich

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    This paper investigates the applicabilities of pole-zero models and wave propagation theory in estimating the phase characteristics of vibrating systems. The measured phase spectra are compared with the estimated reverberant phase limit and wave propagation phase. The relations between transfer function phase and frequency, damping, and separation distance are described. The present results show that the pole-zero model provides a reasonable estimation of the reverberant phase limit in the low frequency band below an identified transition frequency. The reverberant phase is linearly dependent on frequency in this band, but from the transition frequency and onwards the phase increases only with the square root of frequency. This behaviour is characteristic for free propagating waves.
    Original languageEnglish
    JournalChinese Journal of Acoustics
    Volume17
    Issue number3
    Pages (from-to)244-253
    Publication statusPublished - 1998

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