A time-frequency analysis approach to dispersion curve estimation for single-hydrophone acoustic signals in shallow water

Ningning Liang, Yixin Yang, Jianbo Zhou, Xianghao Hou

科研成果: 期刊稿件文章同行评审

4 引用 (Scopus)

摘要

This Letter provides an advanced time-frequency analysis method for quickly and precisely estimating dispersion curves of low-frequency impulsive sounds propagated in shallow water. First, the modal chirplet transform is derived based on an approximated variation law of the modal instantaneous frequency, which can omit the modal filtering step of warping-based methods. Then an extension modal chirplet transform (EMCT) is developed to further improve its potential for automation, together with a trick for fast computation. EMCT is applied to a recorded signal to demonstrate that the method can achieve high time-frequency concentration for modal components in a significantly decreased run time.

源语言英语
文章编号016005
期刊JASA Express Letters
1
1
DOI
出版状态已出版 - 1 1月 2021

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