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Posted by: Bill Landon on Wed, Mar 30, 2005 Provided by: FreeTranslation.com |
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| Sound Isolation @ eCoustics |
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This is a very appropriate saying with regard to sound isolation. We are often asked questions like: "What can I do to this wall to stop the sound going through to the bedroom on the other side?" It's almost incomprehensible to people that the wall may not be (and probably isn't) the only part that is leaking sound to that bedroom. The other parts might well be the floor, the ceiling joists and other shared walls. You could make changes and increase the STC (Sound Transmission Coefficient) dramatically for that wall, but the result might be marginal because the majority of the sound is getting through elsewhere.
In order to deal with sound control one should understand how sound travels. In residential environments it will either be air borne or structure borne. Air borne sound is pretty simple - this is what we hear within the room. A combination of air borne and structure borne approaches need to be considered for sound isolation. One may ask, "But if the room is sealed, isn't all the air borne sound contained?" To a point the answer is yes, but a ˝ inch layer of gypsum is not going to stop 50 Hz, just slow it down (i.e. attenuate) and it could become both an air borne wave and a structure borne vibration in the next room. http://forum.ecoustics.com/bbs/messages/34579/128699.html |
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