{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,1]],"date-time":"2025-12-01T15:04:55Z","timestamp":1764601495329,"version":"3.46.0"},"reference-count":74,"publisher":"Oxford University Press (OUP)","issue":"4","license":[{"start":{"date-parts":[[2025,9,25]],"date-time":"2025-09-25T00:00:00Z","timestamp":1758758400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/pages\/standard-publication-reuse-rights"}],"funder":[{"name":"l\u2019Agence Nationale de la Recherche","award":["AVATARS ANR-22-CE48-0014"],"award-info":[{"award-number":["AVATARS ANR-22-CE48-0014"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2025,9,25]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>This paper models and simulates conservative linear acoustic propagation in axisymmetric pipes with time\u2013space-dependent cross-sections. It extends the horn equation to moving-wall bores. The physical equations (partial differential equations) satisfy a power balance, allowing their formulation as a Port-Hamiltonian system. A two-step numerical method is proposed, which preserves mass, momentum and power conservation in discrete domains. Spatial discretization yields a system of Ordinary Differential Equations (ODE) that satisfies known acoustic characteristics for static walls and ensures power-balanced propagation for controlled dynamic walls. Time discretization via the discrete-gradient method results in a discrete time\u2013space model. Simulations validate conservative propagation and resonances for static walls and capture dynamic vocal tract acoustics during articulation.<\/jats:p>","DOI":"10.1093\/imamci\/dnaf039","type":"journal-article","created":{"date-parts":[[2025,11,11]],"date-time":"2025-11-11T13:14:27Z","timestamp":1762866867000},"source":"Crossref","is-referenced-by-count":0,"title":["Conservative 1D propagation in horns with mobile walls: power-balanced space\u2013time discretization and simulation of the vocal tract"],"prefix":"10.1093","volume":"42","author":[{"given":"Colette","family":"Voisembert","sequence":"first","affiliation":[{"name":"STMS (UMR9912), Ircam, CNRS, Sorbonne Universit\u00e9, Minist\u00e8re de la Culture , 1, place Igor Stravinsky, 75004 Paris ,","place":["France"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5460-1739","authenticated-orcid":false,"given":"Thomas","family":"H\u00e9lie","sequence":"additional","affiliation":[{"name":"STMS (UMR9912), Ircam, CNRS, Sorbonne Universit\u00e9 , Minist\u00e8re de la Culture, 1, place Igor Stravinsky, 75004 Paris ,","place":["France"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Victor","family":"Wetzel","sequence":"additional","affiliation":[{"name":"STMS (UMR9912), Ircam, CNRS, Sorbonne Universit\u00e9 , Minist\u00e8re de la Culture, 1, place Igor Stravinsky, 75004 Paris ,","place":["France"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8178-7308","authenticated-orcid":false,"given":"Fabrice","family":"Silva","sequence":"additional","affiliation":[{"name":"Aix Marseille Univ, CNRS , Centrale Med, LMA UMR 7031, Marseille ,","place":["France"]}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"286","published-online":{"date-parts":[[2025,12,1]]},"reference":[{"key":"2025120110020359700_ref1","doi-asserted-by":"crossref","first-page":"9","DOI":"10.1016\/j.sysconle.2017.10.003","article-title":"Hamiltonian systems discrete-time approximation: losslessness, passivity and composability","volume":"110","author":"Aoues","year":"2017","journal-title":"Syst. 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