The noise levels of 22000:1 contrast ratio projectors that came out in the last 12 months range from 28dB to 36dB. When compared to other 22000:1 contrast ratio projectors that are a similar age to this projector, the noise level of the Viewsonic PJD7326 of 36 decibels is one of the loudest.
There are a number of alternative 36dB noise level data projectors currently available that you might want to consider including cheaper data projectors such as the Viewsonic PJD7526W (£578.19).
If you don't mind having a louder noise level then you might want to consider the Optoma W341 (£515.09) (29dB and cheaper).
What does "noise level" mean?