The NEC M362 has one of the quieter noise levels (only 33 decibels) amongst 10000:1 contrast ratio projectors of this age. The quietest noise level of 10000:1 contrast ratio projectors that have been around for around the same time as this projector is 28dB, the loudest is 49dB, and the average noise level is 36dB.
We compared all the other 33dB noise level multimedia projectors to this projector and we think the Optoma X304M (£599.65) which is cheaper; or the Acer K335 (£609.97) which has better reviews are also worth considering.
Alternative data projectors with a louder noise level that you might want to look at include the Optoma W304M (£696.63) (33dB).
What does "noise level" mean?