Shape Optimization In Rectangular Rooms For A Correct Modal Distribution At Low Frequencies Based On Psychoacustical Model.

Abstract

Resonances in small rooms may lead to inadequate frequency responses. In rooms where
the exigencies on the listening conditions are important, these resonances cause non wanted coloration
effects, which implies a non desirable sound quality. Choosing the correct dimensions it is possible to
reduce the audible effects of these resonances. The presented methodology aims to determine the form
and size of small rectangular rooms based on the finite elements method for modeling the room’s
physical acoustic behavior; a neural network for loudness estimation and genetic algorithm uses to
achieve the optimal dimensions. A comparison with previous techniques used to choose the dimension
of rectangular room is also presented.