Trane TRG-TRC007-EN manual Source-Path-Receiver Model

period three

Acoustical Analysis

notes

Source–Path–Receiver Model

source

path

receiver

Figure 37

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.

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