Soundproofing Walls – Isolation and Noise Reduction Methods

Soundproofing walls imo is the most important part to diy soundproofing.  The walls are very important because this is a major reflection point.  You will hear many cheap studios who do not have side wall soundproofing have very poor results.  When you dont go about soundproofing walls, the thing is you get a very strong comb-filtering effect.

Comb filtering without soundproofed walls is actually the sound bouncing off of one wall and hitting another.  This continues on and on until the frequencies of the sound end up cancelling out.

Soundproofing wall textures are available.  There are heavy paints that claim that they do a good job soundproofing wall surfaces.  Usually in studios you will see carpeting used to soundproof almost everything in the room, including the walls, doors, ceilings and obviously the floor.

A lot of the foam insulation or foam corner deadeners work very well.  Foam does over different advantages to other options as well.

Most of the sound proofing foam you will find will actually have deflection patterns inside the foam.  These look like hills and valleys and do just an excellent job sound sound deadening and killing those bouncing sound waves.

You also have to worry about standing sound waves in a room that did not have even the most basic soundproofing.  Standing waves are waves that bounce and bounc and clash with other standing waves in an unsoundproofed room.

Caulking the studs, simple decoupling.

This next tip is only applicable obviously if you are starting a new build such as a recording studio.  With just the studs exposed, it is common practice to start soundproofing the walls by putting up heavy cauking over the studs.

This both stops vibrations and stops air gaps, sealing them up so no air(which will contain sound) can get through.  You may also see the use of that green glue or other glues here to stop vibration.

If you are in a professional build, you can also look into lead lined sheet rock.  Lead lined sheetrock has about 1/8 inch of lead glued to one side of the sheetrock, you commonly face this side of the soundproofing sheetrock to the studs.

For soundproofing, this lead lined sheetrock is great, but id does coast about $150-300 per piece of sheetrock, now that may seem like a lot, but if your a pro, it soon pays off for itself.  How much does diy soundproofing lead sheetrock weigh?  Well sheetrock lead lined for soundproofing walls weighs about 2 pounds per sheet, soo it can get quite heavy.

Professional soundproofing does cost a bit, but well, thats just a part of being a professional :)

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