Just another test trhead :-) - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 4 Old 09-11-2017, 12:29 PM - Thread Starter
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Just another test trhead :-)

Have a small theater build to post...just waiting for activation :-)
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post #2 of 4 Old 09-11-2017, 12:33 PM - Thread Starter
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Quote:
Originally Posted by dennwood View Post
Have a small theater build to post...just waiting for activation :-)
So after just one muffler installed (and the entire HVAC system exposed) upstairs vent #1 (joins two bedrooms) noise levels dropped from 47db to 35db. A jump of 10db is perceived by many as "double the volume" so that drop is excellent! There will be further drops as the supply and return trunk vents are acoustically lined.

This is what it the 5" ID, 8" OD duct muffler looks like temporarily installed for a quick test:

"Link removed as need to make 5 posts!"

Considering it's about $30 of materials and about 30 minutes to build..pretty good buzz for one's buck there.
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post #3 of 4 Old 09-11-2017, 12:35 PM - Thread Starter
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Image attachment testing...
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post #4 of 4 Old 09-11-2017, 12:39 PM - Thread Starter
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Making your own duct mufflers...
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