H3C Technologies H3C SecPath M9000 Series - Manual (Page 58)

50
Noise
The gateway uses fans with the automatic speed adjustment function, so the sound pressure levels are
different when the fan speeds are different. For more information, see
Table 15 .
Table 15 Sound pressure levels
Model
Sound pressure level under
normal temperature
Sound pressure level when the
fan tray operates at full speed
M9006 62.3 dBA 75.5 dBA
M9010 61.6 dBA 72.6 dBA
M9014 66 dBA 79 dBA