Full waveform inversion for bore reconstruction of woodwind-like instruments

The internal geometry of a wind instrument can be estimated from acoustic measurements. For woodwind instruments, this involves characterizing the inner shape (bore) but also the side holes (dimensions and location). In this study, the geometric parameters are recovered by a gradient-based optimizat...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Ernoult Augustin, Chabassier Juliette, Rodriguez Samuel, Humeau Augustin
Formato:	article
Lenguaje:	EN
Publicado:	EDP Sciences 2021
Materias:	Acoustics in engineering. Acoustical engineering TA365-367 Acoustics. Sound QC221-246
Acceso en línea:	https://doaj.org/article/e96a7a4f3e1445f4909e150c19823e77
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:e96a7a4f3e1445f4909e150c19823e77
record_format	dspace
spelling	oai:doaj.org-article:e96a7a4f3e1445f4909e150c19823e772021-12-02T17:10:48ZFull waveform inversion for bore reconstruction of woodwind-like instruments2681-461710.1051/aacus/2021038https://doaj.org/article/e96a7a4f3e1445f4909e150c19823e772021-01-01T00:00:00Zhttps://acta-acustica.edpsciences.org/articles/aacus/full_html/2021/01/aacus210048/aacus210048.htmlhttps://doaj.org/toc/2681-4617The internal geometry of a wind instrument can be estimated from acoustic measurements. For woodwind instruments, this involves characterizing the inner shape (bore) but also the side holes (dimensions and location). In this study, the geometric parameters are recovered by a gradient-based optimization process, which minimizes the deviation between simulated and measured linear acoustic responses of the resonator for several fingerings through an observable function. The acoustic fields are computed by solving a linear system resulting from the 1D spectral finite elements spatial discretization of the wave propagation equations (including thermo-viscous effects, radiation and side holes). The “full waveform inversion” (FWI) technique exploits the fact that the gradient of the cost function can be computed by solving the same linear system as that of the direct problem but with a different source term. The gradient is computed with better accuracy and less additional cost than with finite-difference. The dependence of the cost function on the choice of the observed quantity, the frequency range and the fingerings used, is first analyzed. Then, the FWI is used to reconstruct, from measured impedances, an elementary instrument with 14 design variables. The results, obtained in about 1 minute on a laptop, are in excellent agreement with the direct geometric measurements.Ernoult AugustinChabassier JulietteRodriguez SamuelHumeau AugustinEDP SciencesarticleAcoustics in engineering. Acoustical engineeringTA365-367Acoustics. SoundQC221-246ENActa Acustica, Vol 5, p 47 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Acoustics in engineering. Acoustical engineering TA365-367 Acoustics. Sound QC221-246
spellingShingle	Acoustics in engineering. Acoustical engineering TA365-367 Acoustics. Sound QC221-246 Ernoult Augustin Chabassier Juliette Rodriguez Samuel Humeau Augustin Full waveform inversion for bore reconstruction of woodwind-like instruments
description	The internal geometry of a wind instrument can be estimated from acoustic measurements. For woodwind instruments, this involves characterizing the inner shape (bore) but also the side holes (dimensions and location). In this study, the geometric parameters are recovered by a gradient-based optimization process, which minimizes the deviation between simulated and measured linear acoustic responses of the resonator for several fingerings through an observable function. The acoustic fields are computed by solving a linear system resulting from the 1D spectral finite elements spatial discretization of the wave propagation equations (including thermo-viscous effects, radiation and side holes). The “full waveform inversion” (FWI) technique exploits the fact that the gradient of the cost function can be computed by solving the same linear system as that of the direct problem but with a different source term. The gradient is computed with better accuracy and less additional cost than with finite-difference. The dependence of the cost function on the choice of the observed quantity, the frequency range and the fingerings used, is first analyzed. Then, the FWI is used to reconstruct, from measured impedances, an elementary instrument with 14 design variables. The results, obtained in about 1 minute on a laptop, are in excellent agreement with the direct geometric measurements.
format	article
author	Ernoult Augustin Chabassier Juliette Rodriguez Samuel Humeau Augustin
author_facet	Ernoult Augustin Chabassier Juliette Rodriguez Samuel Humeau Augustin
author_sort	Ernoult Augustin
title	Full waveform inversion for bore reconstruction of woodwind-like instruments
title_short	Full waveform inversion for bore reconstruction of woodwind-like instruments
title_full	Full waveform inversion for bore reconstruction of woodwind-like instruments
title_fullStr	Full waveform inversion for bore reconstruction of woodwind-like instruments
title_full_unstemmed	Full waveform inversion for bore reconstruction of woodwind-like instruments
title_sort	full waveform inversion for bore reconstruction of woodwind-like instruments
publisher	EDP Sciences
publishDate	2021
url	https://doaj.org/article/e96a7a4f3e1445f4909e150c19823e77
work_keys_str_mv	AT ernoultaugustin fullwaveforminversionforborereconstructionofwoodwindlikeinstruments AT chabassierjuliette fullwaveforminversionforborereconstructionofwoodwindlikeinstruments AT rodriguezsamuel fullwaveforminversionforborereconstructionofwoodwindlikeinstruments AT humeauaugustin fullwaveforminversionforborereconstructionofwoodwindlikeinstruments
_version_	1718381531242692608

Full waveform inversion for bore reconstruction of woodwind-like instruments

Ejemplares similares