Across all the data projectors that were released around the same time as this data projector the noise levels range from 30dB to 42dB. When compared to other data projectors of a comparable spec and age to this projector that we have assessed, the noise level of the Infocus IN114ST of only 30 decibels is one of the quietest.
There are a number of other 30dB noise level multimedia projectors currently available which you might want to consider including because of its better review score, the NEC P501X (£1,223.37).
If you would consider a projector with a louder noise level then you might want to look at the Acer S1210 (£252.45) (31dB).
What does "noise level" mean?