Trane TRG-TRC007-EN manual Examples of a Single Sound Path, Example of Multiple Sound Paths

period three

Acoustical Analysis

notes

Examples of a Single Sound Path

fan-coil

air-cooled chiller

Figure 39

Sound can travel between a single source and the receiver along one or multiple paths. In the case of an air-cooled chiller sitting on the roof of a building, and a receiver located across a parking lot at the edge of the property, sound travels along only one path.

Another example is a fan-coil unit installed under a window in an office. Sound travels primarily along one path, from the fan-coil to the receiver in the same room.

Example of Multiple Sound Paths

source

return	3	2	1	supply
airborne				airborne
		supply
	4	breakout

wall transmission

Figure 40

In other cases there may be several paths for sound to travel from a source to the receiver. This particular example shows the paths associated with an air handler that is installed in a mechanical equipment room adjacent to an occupied space. Only one sound source is included in this analysis, the fan located in the air handler. The receiver is the person working in the office.

The sound travels from the source to the receiver along four separate paths:

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