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

Čurović, Luka (avtor), Murovec, Jure (avtor), Železnik, Anže (avtor), Prezelj, Jurij (avtor)

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.

• Jezik: Angleški jezik
• Ključne besede: small room, sound absorption, low frequency, time-frequency method, finite element method, decay time, material characterization
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FS - Fakulteta za strojništvo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2024
• Št. strani: Str. 1530-1544
• Številčenje: Vol. 43, iss. 3
• PID: 20.500.12556/RUL-166794
• UDK: 534:519.62
• ISSN pri članku: 2048-4046
• DOI: 10.1177/14613484241258622
• COBISS.SI-ID: 197944323
• Datum objave v RUL: 24.01.2025

Gradivo je del revije

• Naslov: Journal of low frequency noise, vibration, and active control
• Skrajšan naslov: J. low freq. noise vib. act. control
• Založnik: Sage Publications
• ISSN: 2048-4046
• COBISS.SI-ID: 526419993

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: majhna odmevnica, absorpcija zvoka, nizkofrekvenčno območje, časovno-frekvenčna metoda, metoda končnih elementov, upadni čas, karakterizacija materialov

Projekti

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P2-0401
• Naslov: Energetsko strojništvo