{
  "abstract": "A semi-analytical, computational framework is developed for the time-dependent propagation, scattering and dissipative decay of a broadband acoustic pulse in a two-dimensional rectangular waveguide whose central segment carries a porous material core bracketed by two clamped flexible membrane strips. The transient treatment follows the wavepacket–Fourier approach. About the centre line the field splits into symmetric and anti-symmetric subproblems; the duct and porous segments are expanded on rigid-wall cosine modes and each membrane on a clamped sine Galerkin basis, whose projection yields a closed-form coupling matrix. The block linear system is validated by point-wise reconstruction of pressure and velocity continuity at every matching plane, by a truncation convergence study, and by two independent energy checks: the absorbed power fraction is recomputed from a dissipation audit of the power fluxes entering and leaving the porous core, and the lossless limit of the porous model is shown to return the incident power in full. The time-dependent field is recovered as a single Gaussian-weighted matrix product over a precomputed wavenumber grid, so that each snapshot costs one matrix–vector product. Numerical experiments delineate transmission, mixed and reflection regimes, locate the membrane–cavity hybrid resonances of maximum absorption, and visualise the transfer of pulse energy to the membranes and porous filler during transit.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Information Systems, College of Computer and Information Sciences, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia",
    "Department of Mathematics, Quaid-i-Azam University, Islamabad, Pakistan",
    "Department of Mathematical Sciences, College of Science, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia",
    "Department of Mathematics and Natural Sciences, Gulf University for Science and Technology, Kuwait"
  ],
  "article_type": "Research Article",
  "arxiv": null,
  "author_total": 4,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Muna Elsadig"
    },
    {
      "affs": [
        1
      ],
      "name": "Muhammad Safdar"
    },
    {
      "affs": [
        2
      ],
      "name": "Hala H. Taha"
    },
    {
      "affs": [
        3
      ],
      "name": "Muhammad Afzal"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/3ygg14jxbmpac.bib",
  "cited_by": 0,
  "doi": "10.1371/journal.pone.0358579",
  "fulltext_url": null,
  "id": "3ygg14jxbmpac",
  "issns": [
    "1932-6203"
  ],
  "landing_url": "https://doi.org/10.1371/journal.pone.0358579",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2204|Acoustic Wave Phenomena Research"
    ],
    [
      "plos",
      "/Biology and life sciences/Physiology/Electrophysiology/Membrane potential"
    ],
    [
      "plos",
      "/Engineering and technology/Membrane technology/Membrane structures"
    ],
    [
      "plos",
      "/Engineering and technology/Signal processing/Signal bandwidth"
    ],
    [
      "plos",
      "/Engineering and technology/Structural engineering/Built structures/Membrane structures"
    ],
    [
      "plos",
      "/Physical sciences/Physics/Acoustics"
    ],
    [
      "plos",
      "/Physical sciences/Physics/Classical mechanics/Reflection"
    ],
    [
      "plos",
      "/Physical sciences/Physics/Resonance"
    ],
    [
      "plos",
      "/Physical sciences/Physics/Resonance/Resonance frequency"
    ],
    [
      "plos",
      "/Research and analysis methods/Bioassays and physiological analysis/Electrophysiological techniques/Membrane electrophysiology"
    ]
  ],
  "openalex": "W7214917326",
  "pdf_url": "https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0358579&type=printable",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-30",
  "publisher": "Public Library of Science",
  "ris": "https://research.draconitic.com/paper/3ygg14jxbmpac.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:37Z",
      "native_id": "10.1371/journal.pone.0358579",
      "source": "plos",
      "url": "https://doi.org/10.1371/journal.pone.0358579"
    }
  ],
  "subjects": [
    {
      "field": "medicine",
      "origin": "plos:physiology",
      "subfield": "physiology"
    }
  ],
  "title": "Computational time-dependent acoustic scattering in a rectangular membrane–porous waveguide",
  "title_text": "Computational time-dependent acoustic scattering in a rectangular membrane–porous waveguide",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:17:37Z",
  "url": "https://research.draconitic.com/paper/3ygg14jxbmpac",
  "venue": "PLOS One",
  "versions": []
}