At 37 decibels, the Epson 1264 has a quite loud noise level compared to most of the other 15000:1 contrast ratio data projectors that have been on the market for a similar time to this data projector. Across all the comparable spec projectors that came out around the same time as this projector the noise levels range from 29dB to 39dB, and the average noise level is 35dB.
Alternative 37dB noise level multimedia projectors currently available which you might want to consider include because of its better review score, the Epson EH-TW570 (£431.73).
If you don't mind having a louder noise level then you might want to consider the EB-W32 (£476.50) (37dB), or the S31+ (37dB) both from Epson.
What does "noise level" mean?