With a noise level of 37 decibels, the Hitachi CPX4041WN has a quite loud noise level compared to most of the other multimedia projectors of a comparable age and type to this data projector. Across all the projectors of this spec and age the noise levels range from 27dB to 48dB.
We think you might also be interested in some of the alternative 37dB noise level multimedia projectors currently available including cheaper projectors such as the Hitachi CPWX3541.
If you are not worried about having a louder noise level then you might want to consider the Benq MH741 (£631.88) (36dB and higher rated); or the Canon WX310ST (£596.99) (36dB and cheaper).
What does "noise level" mean?