Exhaust vs filtering

[Kennyd]

Originally Posted by Conrad

Kenny,
Your pictures show that the DC registered 82 decibels before you added all of your sound reducing things (closet, muffler, folded plenum, insulated hvac duct, etc.). What was the noise measurement after all these steps?

Sorry Conrad, I thought I followed this up-thanks for the reminder.

I just added two more photos that I just took tonight, I hope this helps. I use my setup a lot, especially with the blast cabinet and it all works perfectly.

[Conrad]

Thanks for the followup. So your sound proofing closet took the noise down from 82 db to 68 db. That Huge, since it's an exponential scale, and 80 db is twice as loud as 70 db, you cut out 62% of the noise.

From what I read, 82 db is a little louder than a garbage disposal and 68 db is toward the high end of normal conversation. I will want to vent outside, and that's the difference between annoying my neighbors and not. Thanks a lot for sharing your method and results.