period five

Review

notes

Review—Period Three

source

return

3

2

1

supply

airborne

 

 

airborne

 

 

supply

 

 

 

4

breakout

 

wall transmission

Figure 71

Period Three walked through the steps of an acoustical analysis, including setting the design target for the indoor or outdoor environment, and performing a source–path–receiver analysis. This method of analysis 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.

Remember:

nOne piece of equipment may contain several sound sources.

nSound may travel from a single source to the receiver along multiple paths.

nThe total sound heard by the receiver is the sum of all the sounds from various sources that travel along several paths.

Computer software analysis tools are available to aid in performing this type of calculation-intensive analysis.

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Trane TRG-TRC007-EN manual Review-Period Three