I own the Sharp LCD;pretty quiet. You can hear the motor for the lens adj,zoom,but that's about it.AND it sits right at my feet.Now on to the problem at hand. You know if you stick your hand in front of a tweeter the sound is gone;sort of.If you have one of those Room Tunes triangles,or something smilar;-- have some one hold it up--and move it around. See if the noise has a specific "coming from the projector" location.You could also be getting part of that noise reflected from the celing--a pad on the celing? One might also try some kind of rubber donut between the celing and the celing mount.--A cut down vibrapod.One more: A fake shelf under the unit lined with sound deadening squares.
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