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In this thesis, we will propose a method, the SBR-image
method, tosimulate the sound wave propagation in a large empty
room. With this method, weshoot ray tubes from a sound source
until it hits a wall which we assume to bea rigid wall for
simplicity. According to the law of reflection, we can tracethe
ray tube in its new direction towards the next wall. In every
bounce, wehave to examine whether the receiver is in the ray
tube. If the ray tube hitthe receiver, there is a ray
corresponding to a specific image going to thereceiver. As soon
as the path length of the ray tube has exceeded over aprescribed
value, we stop tracing that ray tube, and start to trace another
raytube. This procedure is repeated until all of the ray tubes
have been traced.By superposition, we can calculate the
contribution of every equivalent soundsource individually. By
this method, we computed the distribution of soundpressure in
different kinds of buildings. The results are rather
satisfactory.
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