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TRG-TRC007-EN 37
period three
Acoustical Analysis
notes
Sound-Path Modeling
When all the paths have been identified, they can be individually modeled to
determine the contribution of each to the total sound heard by the receiver.
Sound-path modeling studies how sound from a source changes on its way
to a receiver. The pieces that make up the path from source to receiver can be
called elements of the path.
Returning to the air-handler example, one path that sound travels from the air-
handling unit (source) to the person in the office (receiver) is to follow the
conditioned air supplied to the space. In addition to the source and receiver,
the elements of this path include the components of the air distribution system,
such as straight pieces of duct, possibly duct silencers, elbows, junctions, and
diffusers. The path also includes the acoustical characteristics of the occupied
space, such as its size, floor coverings, furnishings, and wall construction.
receiver
receiver
source
source
Modeling Sound Paths
diffuser
diffuser
straight duct
straight duct
elbow
elbow
Figure 42