Optimized method for Helmholtz resonator design formed by perforated boards

Autor:	Zuzana Fišarová, Jan Pencik, Aleš Rubina, Ondrej Nespesny, David Jun
Rok vydání:	2021
Předmět:	Materials science Acoustics and Ultrasonics Acoustics Reverberation room Room acoustics Transfer matrix Calculation methods law.invention Resonator symbols.namesake Noise reduction coefficient Computer Science::Sound law Helmholtz free energy symbols Helmholtz resonator
Zdroj:	Applied Acoustics. 184:108341
ISSN:	0003-682X
DOI:	10.1016/j.apacoust.2021.108341
Popis:	The article focuses on an optimized method for Helmholtz resonators (HR) design to be used in room acoustics. They are resonators in the form of acoustic wall facings and ceilings formed by perforated boards with circular apertures. In order to verify available calculation methods for sound absorption coefficient, an experiment was performed in a reverberation room. Several variants of the internal absorbent and internal arrangement of the HR cavity for the experiment were measured. The measured data were compared with two available methods of sound absorption coefficient calculation for normal incidence using a 1D transfer matrix and electro-acoustic analogy. The calculation optimization was performed with the use of the measured data with the aim to reach better conformity of calculated courses of the sound absorption coefficient and the reverberation room measurements.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7807bf1614e9c6f8959d75d66f76325f https://doi.org/10.1016/j.apacoust.2021.108341 Zobrazit plný text záznamu Full Text from ScienceDirect