Noise Control Modelling in Non-Diffuse Enclosed Spaces Using an Image Source Model

Noiseconnolmethodsa reusedtoredncetbeno iseexpomeofworkm inanindustrial environmatt.Undl now only ray-tracing models.arch as the MYCUB model by Ondet and Barbry .were capable of geometrically modelling noise control methods such as acoustic barriers and addition of absorptive material to room Manes (absorptive palches).However.ray-racing models have long nut-times and may not he of practical use when a comparison of several alternative noise control methods is wired.lr has been shown that imagesoume based models can anonwa predict sound distribution in factories .but due to their limited geometn'c Wh m of the space the effect on the sound distribution of noise control methods W be predicted.The current image-source factory nuke prediction model developed by Lindqvist , rewritten by Ondet' and extended by Dance used a geometric representation of a parallelepiped shaped space with each of the six surface: having an associated absorption coef cient The model did not incot-poate any method of representing barriers or absorptive patches.