Baffled Air Inlet Box to Dampen Sound

[evansd2]

insulated duct is key here. That immediately cut my sound by a lot.

I used this:

Master Flow 4 in. x 25 ft. Insulated Flexible Duct R6 Silver Jacket F6IFD4X300...

Best $25 I spent lately.

Previously:

Sound Dampening Table Top for your Glowforge

I wanted to continue to cut down on the noise output from the glowforge. The major issue I had was the vent holes on the bottom of the unit reflect sound right off of the table top and out the air gap between the unit and the table. I initially tried putting up some semi sound reflective walls to see if it would help. It did help a little, but was more trouble than it was worth, and I didnt want to restrict air flow. The next step was to make an inset an-echoic like chamber for the glowforge to…