With a noise level of 38 decibels, the NEC M402X has a quite loud noise level compared to most of the other similar spec data projectors that came out around the same time as this multimedia projector. The average noise level of 10000:1 contrast ratio projectors that were released more than two years ago is 36dB, and the noise levels range from 28dB to 49dB.
It may also be worth also looking at one of the alternative 38dB noise level multimedia projectors currently available including because of its better review score, the NEC NP-M282.
If you are not concerned about having a louder noise level then you might want to look at the NEC NP-M332 (£446.01) (38dB).
What does "noise level" mean?