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TRG-TRC007-EN 33
period three
Acoustical Analysis
notes
Predicting the sound level in a given space requires making a model of the
system. A source–path–receiver model provides a systematic approach to
predict the acoustical characteristics in a space. As the name suggests, this
modeling method traces sound from the source to the location where we want
to predict the sound (the receiver). How the sound travels between the source
and the receiver, and everything it encounters as it travels along the way,
constitutes the path.
In the example shown in Figure 37, the source is the fan in the mechanical room.
The receiver is the person working in the adjacent office space. The supply duct
provides one of the paths for sound to travel from the source to the receiver.
Using such an analysis, the designer can determine the effect of the paths on
the sound emanating from the source, and can specify the maximum allowable
equipment sound power that will not exceed the sound-pressure target for
the space.
Source–Path–Receiver Model
receiver
receiver
path
path
source
source
Figure 37