Local Time-Domain Spherical Harmonic Spatial Encoding for Wave-Based Acoustic Simulation

Stefan Bilbao*, Archontis Politis, Brian Hamilton

*Tämän työn vastaava kirjoittaja

    Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

    12 Sitaatiot (Scopus)
    83 Lataukset (Pure)

    Abstrakti

    Volumetric time-domain simulation methods, such as the finite difference time domain method, allow for a fine-grained representation of the dynamics of the acoustic field. A key feature of such methods is complete access to the computed field, normally represented over a Cartesian grid. Simple solutions to the problem of extracting spatially encoded signals, necessary in virtual acoustics applications, result. In this letter, a simple time-domain representation of spatially encoded spherical harmonic signals is written directly in terms of spatial derivatives of the acoustic field at the receiver location. In a discrete setting, encoded signals may be obtained, at very low computational cost and latency, using local approximations with minimal number of grid points, and avoiding large convolutions and frequency-domain block processing of previous approaches. Numerical results illustrating receiver directivity and computed time-domain responses are presented, as well as numerical solution drift associated with repeated time integration.

    AlkuperäiskieliEnglanti
    Artikkeli8656507
    Sivut617-621
    Sivumäärä5
    JulkaisuIEEE Signal Processing Letters
    Vuosikerta26
    Numero4
    DOI - pysyväislinkit
    TilaJulkaistu - 1 huhtik. 2019
    OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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