Trane TRG-TRC007-EN Manuale Utente

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TRG-TRC007-EN

period three

The work, and art, of an acoustical analysis is in identifying and quantifying the 
various paths that sound travels from the source to the receiver. There are 
primarily three different types of sound paths.

n Airborne: This is a path where sound travels with, or against, the direction 

of airflow. In a HVAC system, sound travels along this type of path through 
the supply ductwork, return ductwork, or an open plenum.

n Breakout: This type of path is typically associated with sound breaking out 

through the duct walls and into the space.

n Transmission: This is a path where sound travels through walls, floors, 

and ceilings. In its simplest form, this path involves sound traveling directly 
through the air from the source to the receiver.

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Sound that travels through supply ductwork, return 

ductwork, or an open plenum

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Can travel with or against the direction of airflow

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Sound that breaks out through the walls of the supply 

or return ductwork

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Sound that travels through walls, floors, or ceilings