Název:	Possibilities of verifying the parameters of the absorbing elements using the loudspeaker
Autoři:	Bouzek, Stanislav Tureček, Oldřich
Citace zdrojového dokumentu:	BOUZEK, , TUREČEK, O. Possibilities of verifying the parameters of the absorbing elements using the loudspeaker. In: EuroNoise 2018 : conference proceedings. Crete: The European Acoustics Association, 2018. s. 71-73. ISSN: 2226-5147
Datum vydání:	2018
Nakladatel:	The European Acoustics Association
Typ dokumentu:	konferenční příspěvek conferenceObject
URI:	http://hdl.handle.net/11025/33827
ISSN:	2226-5147
Klíčová slova v dalším jazyce:	absorption coefficient;loudspeaker impedance;room acoustics;Helmholtz resonator
Abstrakt v dalším jazyce:	This paper deals with other option of determination of the acoustic absorbing materials parameters. Simplified procedures are often used to design new absorbing elements. These procedures are based on an ideal model or previous experience. The result is often quite inaccurate. To verify the absorption coefficient α, measurements in the reverberation chamber or impedance tube are required. Both of these methods require expensive and special equipment, which is not available to everyone. For measurement in the reverberation chamber it is necessary to have approx. 10 m2 of the measured sample. In the impedance tube there are measured only small circular samples and the coefficient α only for the perpendicular impact of sound waves. Thus, these methods are not suitable for designing prototypes of new absorbing elements. For this reason, other possibilities for determination of important parameters on a relatively small prototype sample were investigated. The result of this research is an experiment describing a possible measurement method. This method is based on change of the loudspeaker impedance due to placing prototype of the absorbing element into a common baffle.
Práva:	Plný text je přístupný v rámci univerzity přihlášeným uživatelům. © The European Acoustics Association
Vyskytuje se v kolekcích:	Konferenční příspěvky / Conference papers (KET) Konferenční příspěvky / Conference papers (RICE) OBD

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