Author Topic: My little stereo disturbs the downstairs neighbors  (Read 2573 times)

rongon

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My little stereo disturbs the downstairs neighbors
« on: December 19, 2011, 05:26:40 AM »
I just moved into a 2nd flr co-op apt. Hooked up my low-powered stereo. Its not very loud, honestly. My speakers are 2-way bookshelf's.

My downstairs neighbors complained that the bass from my stereo shakes their walls. I can feel bass from below when they play their home theater, but I can't hear any mids or highs.

I apologized and told them how concerned I was that low freqs were coupling into their space. I told them no more music past about 8pm, for which they expressed gratitude.

I'd like to reduce the transmission of bass freqs thru the floor. The living room is 12' x 24', carpeted, with a 6' x 8' parquet wood tiled area to one side. The floor is bouncy. How about a layer of MLV sheet, laid over the existing carpet, and then a layer of carpet on top of that?

Auralex SpeakerDudes (foam riser pads) to decouple the speakers from the stands? Would that help if a problem is direct coupling of low freq vibrations into the floor?

Suggestions?
Ron

Randy S

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Re: My little stereo disturbs the downstairs neighbors
« Reply #1 on: December 19, 2011, 09:25:56 AM »
yes Start by decoupling, break the direct connection. Than you will be able to see the true value of the floor ceiling system. You can do an underlayment of MLV w/ closed cell foam beneath the carpet and padding, however the wood flooring area would still be the area of least resistance and sound would be heard below to some degree...you will still see a value of reduction.
Randy Sieg

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rongon

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Re: My little stereo disturbs the downstairs neighbors
« Reply #2 on: December 21, 2011, 07:37:52 PM »
Thanks for your quick reply!

I found a set of eight sorbothane "pod" feet to put under my speakers. My speaker stands right now are less than ideal. They're a pair of rectangular milk crates with 1/2" thick MDF boards on top, with the speakers sitting on top. Now the sorbothane feet are between the spkrs and the boards. I'll add the foam speaker risers soon...

Re: initial floor treatment

- Were you suggesting two layers under the carpet and padding? 1#/ft2 MLV and closed cell foam?

- Can the MLV be used as a 'carpet pad' under a 10' x 14' area rug on top of the 12' x 24' carpeted area? Sort of using the existing carpet as a 'pad' under the MLV?

My stereo is not meant to play at rock concert levels, but the bass conduction thru the walls is crazy in this place. Even a 3 to 5 dB reduction of bass energy transmitted downstairs would make a big difference.

Thnx again

Randy S

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Re: My little stereo disturbs the downstairs neighbors
« Reply #3 on: December 21, 2011, 07:51:49 PM »
If that is the case, then get rid of the wood and crates...put the underlayment beneath the speaker on top of the carpet and padding...this should give you the 3-5db reduction.
Randy Sieg

Super Soundproofing Co
www.soundproofing.org
888-942-7723
Ph. 760-752-3030
Fax.760-752-3040