With a noise level of 38 decibels, the CP-WX5500 has a quite loud noise level compared to most of the other data projectors of a similar age and spec to this data projector. Across all the projectors that have been on the market for a comparable time to this multimedia projector the noise levels range from 27dB to 48dB.
There are a number of alternative 38dB noise level multimedia projectors currently available which you might also want to look at including the Hitachi CP-X5550 (£1,059.60) which is cheaper.
Projectors with a louder noise level that might be worth considering include the Epson 1970w (39dB and cheaper), or the Benq MH856UST (£1,150.30) (37dB and cheaper).
What does "noise level" mean?