Fast-Moving Sound Source Tracking With Relative Doppler Stretch

Chen, Guo; 卢, 永刚

doi:10.1109/access.2020.3043270

Cited by 3 publications

(1 citation statement)

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“…In those works, the sound sources that must be localized and possibly quantified are generally stationary and at a fixed location. Indeed, characterizing moving sources is more challenging than stationary sources due to the time-varying spatial location and possible frequency shifts at the receiver's position caused by the non-stationary motion and Doppler effect (Meng et al, 2019;Chen and Lu, 2020).…”

Section: Introductionmentioning

confidence: 99%

Space-time reconstruction of a moving acoustic loading on a membrane by coupling the force analysis technique and full-field non-contact vibration measurements

Mougey,

Robin,

Melon

2024

Front. Acoust.

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Identifying acoustical and mechanical loadings on structures is a common problem in acoustics and vibration analysis and stationary loadings are mostly considered on plate-like structures. This work describes a proof of concept for reconstructing the trajectory of an acoustic source moving in front of a membrane. Compared with works focusing on precisely identifying a loading’s amplitude at a given location, the objective is to reconstruct the loading’s trajectory–Qualitative loading identification is sought rather than quantitative. The force analysis technique is used to recover a space-time varying loading on a structure, starting from time-resolved full-field non-contact vibration measurements conducted on a circular membrane. At the same time, a compact and tonal sound source is used to draw freehand shapes in front of the membrane. The loading trajectory, therefore, contains information that was “acoustically written”. Simple hand gestures that correspond to the drawing of a Greek letter (Σ), a capital letter (P), two shapes (♡, ⋆), and a 3-letter word (net) are recovered using the proposed procedure. The effect of various parameters on the reconstructed information is studied. Perspectives in terms of possible research areas and applications are finally discussed. These perspectives include, for example, the use of membranes to help reconstruct complex and space-time-varying loadings or even applications in musical acoustics on membranophones.

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Section: Introductionmentioning

confidence: 99%