The instantaneous frequency (IF) of a pure tone emitted by a transiting acoustical source varies due to the acoustical Doppler effect, which is usually used to estimate the velocity of the source. Hence, the common practice is first to estimate the IFs by the time-frequency analysis (TFA) of the signals and then to derive the velocity from the IFs. In this paper, a TFA method based on the chirplet transform is proposed where the IFs of the chirplets are formulated by the nonlinear kinetic function with respect to the source velocity. By iteratively fitting the chirplets to the signals it directly renders the velocity of the source. The efficiency of the proposed method is validated by the microphone recorded noise data due to a flying helicopter during an experiment carried out in May, 2018, northeast to the coast of Sanya, Hainan province, China.
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September 2018
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September 01 2018
Estimating the velocity of a moving acoustic source based on chirplet transform
Ningning Liang;
Ningning Liang
School of Marine Sci. and Technol., Northwestern PolyTech. Univ., 127 West Youyi Rd., Beilin District, Xi'an, Shaanxi 710072, China, [email protected]
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Yixin Yang;
Yixin Yang
School of Marine Sci. and Technol., Northwestern PolyTech. Univ., 127 West Youyi Rd., Beilin District, Xi'an, Shaanxi 710072, China, [email protected]
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Xijing Guo;
Xijing Guo
School of Marine Sci. and Technol., Northwestern PolyTech. Univ., 127 West Youyi Rd., Beilin District, Xi'an, Shaanxi 710072, China, [email protected]
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Boxuan Zhang
Boxuan Zhang
School of Marine Sci. and Technol., Northwestern PolyTech. Univ., 127 West Youyi Rd., Beilin District, Xi'an, Shaanxi 710072, China, [email protected]
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J. Acoust. Soc. Am. 144, 1944 (2018)
Citation
Ningning Liang, Yixin Yang, Xijing Guo, Boxuan Zhang; Estimating the velocity of a moving acoustic source based on chirplet transform. J. Acoust. Soc. Am. 1 September 2018; 144 (3_Supplement): 1944. https://doi.org/10.1121/1.5068507
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