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Faculty of Mechanical Engineering, Lj. (FSLJ)
  • Estimation of sound absorption coefficient at modal frequencies using decay time measurements and eigenvalue model in a small room [Elektronski vir]
    Čurović, Luka ...
    Measuring the sound absorption coefficient in a small reverberation room below the Schroeder frequency is a challenging task and the results are subject to a high degree of uncertainty. Recent ... research shows that the low-frequency acoustic properties of the enclosure and the test sample should be characterized by quantities that describe the modal sound field. The aim of this paper is to present a method for estimating the absorption coefficient of a test sample at modal frequencies in the low frequency range and to demonstrate its applicability in a small room. The hybrid inverse approach is based on eigenvalue measurement data coupled with a finite element model to estimate the sound-absorbing properties of a small room and the test sample. The method was tested experimentally and the results were consistent with those of the long impedance tube method. The applicability of the proposed method was further demonstrated by the in-situ characterization of different acoustic samples in the low frequency range.
    Source: Journal of low frequency noise, vibration, and active control [Elektronski vir]. - ISSN 2048-4046 (Vol. 0, [iss.] 0, 2024, str. 1-15)
    Type of material - e-article ; adult, serious
    Publish date - 2024
    Language - english
    COBISS.SI-ID - 197944323

    Link(s):

    https://journals.sagepub.com/doi/10.1177/14613484241258622
    DOI

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