Overview
FrançaisABSTRACT
The acoustic study of a room is carried out via an approach by models. This does not only involve acoustic knowledge. In this article, this approach is illustrated by three examples. The first one, a simple optimization attempt based on a traditional model, is an intermediary stage between the systematic approach and the linearized approach. The second one, based on a simple comparison of two calculation formulae of a reverberation length, is a typical bifurcation scheme involved in most models. The third example illustrates how the failure of a traditional model can be addressed in order to achieve suitable adequacy between measurements and predicted values.
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Read the articleAUTHOR
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Jacques JOUHANEAU: Professor, former holder of the CNAM Acoustics Chair
INTRODUCTION
This approach is more straightforward than the systematic
To fully understand the benefits of this approach, we'll illustrate it with three examples:
The first example is a simple attempt to optimize a classical model, but the difficulties encountered reveal the need to make choices that tend by all means to reduce the number of variables. This is an intermediate stage between the first approach (systematic –
The second example, based on a simple comparison of two TR calculation formulas, shows a typical bifurcation pattern commonly found in most comparative models.
The third example shows how the failure of a classical model can lead to the development of other models, and how these other models can be "chained" to give rise to coherent interpretations that can improve our understanding of the underlying physical phenomena.
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Methodological guide for the acoustic study of a hall
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SNCF acoustics laboratory with the collaboration of Corinne Fillol.
AREP acoustics laboratory with the collaboration of Agnès Drevon.
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