Browsing by Subject "acousties in interiors of sacral structures"

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Access status: Open Access ,
Acoustic properties of the selected churches in Poland
(Wydawnictwa AGH, 2005) Engel, Zbigniew; Kosała, Krzysztof
The assessment ofthe acoustic properties of interiors of sacral buildings was, for many years, done by means of methods developed primarily for assessing concert halls, opera houses or auditoriums adapted for sacral buildings. Those are Beranek's, Ando's, RASTI and impulse methods. The paper provides short description of those methods as well as their yerification performed by the authors and graduate students of the Chair of Mechanics and Vibroacoustics AGH in several roman catholic churches in Poland. The analysis of those methods proved that - when applied to sacral objects - they are often not complete and must be supplemented. Regardless of numerous papers concerning investigations and creation of acoustic conditions in sacral objects, there is a lach of a uniform, specific method which would allow to assess the acoustic ąuality of such interiors. The new index method, which assesses the acoustic properties of sacral objects by a single-numbered - the global index of acoustic quality - is presented shortly in the paper. This global index is a function of several partial indices, namely: reverberation index, intelligibility of speech index, uniformity of loudness index, external disturbance index and musie sound ąuality index. The index method was applied and yerified in five roman catholic churches in Poland.