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Field Sound
Transmission Loss
Acoustical standards require field sound
transmission loss be graphically depicted as a
function of frequency. The above graph is for a
partition separating two offices. The black diamond
curve shows the field transmission loss, the
lavender square curve shows the effects of sound
flanking around the partition, and the green
triangle curve shows the standard sound transmission
class (STC) contour. The test results indicate a 3 STC point reduction due to the sound flanking path,
which was traced to the partition/floor junction not
being sealed with acoustical caulking. |
