Naslov
Examination of the influence of standing waves on reverberation time measurements in small reverberant rooms

Autori
Jambrošić, Kristian

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, neobjavljeni rad, znanstveni

Izvornik
1ER CONGRESO INTERNACIONAL DE ACÚSTICA DE LA UNIVERSIDAD NACIONAL DE TRES DE FEBRERO / Fontdevilla, Pablo ; Bidondo, Alejandro - : Universidad Nacional de Tres de Febrero, 2008

Skup
1ST INTERNATIONAL ACOUSTIC CONGRESS ON ACOUSTICS

Mjesto i datum
Buenos Aires, Argentina, 2008

Vrsta sudjelovanja
Pozvano predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
reverberation time measurement; standing waves

Sažetak
In this lecture, different well-established methods of reverberation time measurement will be compared. This includes the standardized methods (EN ISO 3382:2000), namely the impulse response measured with pink noise, exponential sweep, MLS, but also additional methods like pistol shots of different calibers, balloon bursts, gated external pink noise, and the B&K filtered burst method. In order to make the comparison, the measurements were performed in four acoustically very different spaces - a rather small and well-damped listening room, a much bigger damped drama theatre, a rather reverberant atrium, and a large and very reverberant shoebox-shaped room. Although the relevant standards state that impulse-like sources should be avoided due to the lack of measurement repeatability, their use has proved to be necessary due to inability of conventional omni-directional loudspeakers to provide adequate sound pressure levels at the low end of the frequency range of interest. Therefore, the peak sound pressure levels and the amount of low frequency content of following sources were measured: pistol shots, firecrackers with different amount of explosive compound and balloon bursts. Special attention has been given to measurements of reverberation time in small and rather reverberant shoe-box type room, in order to determine the spatial distribution of reverberation time with respect to the formation of standing waves in the room itself.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

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