title: Complete de-Dopplerization and acoustic holography for external noise of a high-speed train.
abstract: Identification and measurement of moving sound sources are the bases for vehicle noise control. Acoustic holography has been applied in successfully identifying the moving sound source since the 1990s. However, due to the high demand for the accuracy of holographic data, currently the maximum velocity achieved by acoustic holography is just above 100 km/h. The objective of this study was to establish a method based on the complete Morse acoustic model to restore the measured signal in high-speed situations, and to propose a far-field acoustic holography method applicable for high-speed moving sound sources. Simulated comparisons of the proposed far-field acoustic holography with complete Morse model, the acoustic holography with simplified Morse model and traditional delay-and-sum beamforming were conducted. Experiments with a high-speed train running at the speed of 278 km/h validated the proposed far-field acoustic holography. This study extended the applications of acoustic holography to high-speed situations and established the basis for quantitative measurements of far-field acoustic holography.
authors.affiliation: State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China.
authors.forename: Diange
authors.initials: D
authors.lastname: Yang
authors.affiliation: State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China.
authors.forename: Junjie
authors.initials: J
authors.lastname: Wen
authors.affiliation: State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China.
authors.forename: Feng
authors.initials: F
authors.lastname: Miao
authors.affiliation: State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China.
authors.forename: Ziteng
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Environmental Control & Occupational Hygiene Research Institute, China Academy of Railway Sciences, Beijing 100081, China.
authors.forename: Xiaoan
authors.initials: X
authors.lastname: Gu
authors.affiliation: State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China.
authors.forename: Xiaomin
authors.initials: X
authors.lastname: Lian