At 37 decibels, the Epson PowerLite Pro G5200WNL has a fairly loud noise level compared to most of the other data projectors of a comparable type and age to this data projector. The quietest noise level of data projectors of this age and spec is 21dB and the loudest is 41dB.
There are a number of alternative 37dB noise level multimedia projectors currently available which you might want to consider including because of their better review scores, the EH-TW5300 (£449.99), or the EH-TW5210 (£431.86) both from Epson.
Projectors with a louder noise level that might be worth considering include the Epson EB-530S (£626.69) (37dB).
What does "noise level" mean?