Noise Criterion Curves - Mars Comfort-Aire Century VCD-SA Series Service Manual

Service Manual - VCDxxSA

7. Noise Criterion Curves

1m/3.28ft
2m/6.56ft
1.5m/4.92ft
Notes:
-Sound measured at 1.5m/4.92ft away from the center of the unit.
-Data is valid at free field condition
-Data is valid at nominal operation condition
-Reference acoustic pressure OdB = 20µPa
-Sound level will vary depending on a range of factors such as the construction -(acoustic absorption coefficient) of particular room
in which the equipment is installed.
-The operating conditions are assumed to be standard.
B-VCD24SA-1
 IDU-Air Handler 9 