Mass Loaded Vinyl (MLV) Acoustic Treatments - A Question


MLV comes in different thicknesses, from thin drapes to sheets inches thick

At this point in time - I have installed a vinyl roller blind that is very effective at preventing reflections and because it is installed at the ceiling-wall boundary, also traps/disperses reflections there - a bonus!

But unfortunately it is not effective are preventing the very low frequency "bass blooming" I am currently experiencing.

From what I have read, my room is the ideal size for the propagation of low frequency standing waves- 11.5' x 15' x 8'(high) 

So I was wondering if anyone out there had used the thicker versions of MLV in order to curb bass related issues and if so - what thickness did you find effective and how did you install it?

My system resides in my Living Room, so I am trying to "limit the visibility" of any device I install, either by design or concealment.

Many Thanks

williewonka

Showing 1 response by dlcockrum

Hi all,

I have nothing that compares with bugredmachine’s extensive "ground-up" installation, but went through a challenging time damping the excessive low/mid-bass frequencies in my 15’ X 24’ X 9’ room.

I read a ton of stuff by Jon Risch on another forum and built floor-to-ceiling SEALED corner bass traps using 2" thick by 24" wide dense fiberglass panels (not the loose pink in-a-roll kind you buy at home-improvement stores) found at a builder supply warehouse and common 1/2" thick 4" wide plywood planks to build the frame around the fiberglass. Covered them with an attractive acoustically transparent fabric to match the room and to keep fiberglass particles from entering the air in my listening room. I used a thick, yet pliable rubber garage-door gasket material to seal the traps into the front corners of the room (behind the speakers) all the way around the frame.

These worked wonders to eliminate the exaggerated mid/low bass in my room without overdamping the overall sound. Pics can be seen on my system page.

I also built smaller 2" thick 24" X 48" panels for side-wall reflections using the same materials and construction technique (but unsealed) that are place at the midpoint between my speakers’ front baffle and my listening position. Audible improvement in imaging and soundstaging.

I recall that it cost me around $500 total plus a few days of dedicated construction/installation time.

I hope this is helpful.

Best to you all,
Dave