"Michael Horowitz" wrote in message
...
Short of putting it in an insulated box, or converting it to electric,
anyone have any ideas how I might quiet it?

It would probably be too loud even if it had an electric motor,
particularly if the compressor is of the light weight, oiless variety. An
intake muffler on the compressor may help a bit, but the fact is that
compressors are loud and engines tend to be even louder, even with good
mufflers. I am afraid that there is no "magic bullet" here. When I built my
generator shed in my back yard (20 feet away from the house to manage the din) I
buried an air hose so that my compressor could also be banished out there.

Vaughn