Estimation of sound absorption coefficient at modal frequencies using decay time measurements and eigenvalue model in a small room

• Published in: Journal of low frequency noise, vibration, and active control Vol. 43; no. 4; pp. 1530 - 1544
• Main Authors: Čurović, Luka, Murovec, Jure, Železnik, Anže, Prezelj, Jurij
• Format: Journal Article
• Language: English
• Published: London, England SAGE Publications 01.12.2024; Sage Publications Ltd; SAGE Publishing
• Subjects: Absorptivity; Acoustic properties; Eigenvalues; Estimation; Finite element method; Frequency ranges; Low frequencies; Sound fields; Sound transmission; finite element method; decay time; sound absorption; time-frequency method; material characterization; Small room; low frequency

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 ch...