The quietest noise level of data projectors of a comparable age and type to this data projector is 26dB, the loudest is 40dB, and the average noise level is 33dB. With a noise level of 36 decibels, the Benq MW843 has a fairly loud noise level compared to most of the other 13000:1 contrast ratio projectors that were released more than two years ago.
Other 36dB noise level data projectors currently available that you might want to consider include the Benq MX768 (£916.61) which has better reviews.
Data projectors with a louder noise level that might be worth looking at include the MX822ST (£871.34) (40dB), or the MW821ST (£999.99) (33dB) both from Benq.
What does "noise level" mean?