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Author Topic: Best way to soundproof a stage Richard May Phenomenal Film Handler Posts: 1057 From: Floral Park, NY USA Registered: Aug 2004 posted 11-24-2005 08:27 PM                     What is the best material to use to soundproof a stage and behind it without opening up the existing walls. It is an old theater chopped up to 3. Downstairs is split down the middle. The upstairs large balcony remains with a screen put just past the old balcony railing. A typical split. There is a lot of bleed through of sound from the upstairs theater especially from around the screen area. Now they are going to do live bands which will make for even more leakage.  |  IP: Logged William Hooper Phenomenal Film Handler Posts: 1879 From: Mobile, AL USA Registered: Jun 99 posted 11-25-2005 06:36 AM                        I'm having trouble visualizing the way the auditorium is split. It sounds like you mean that the upstairs auditorium is getting sound from outside into it. Some others may have more helpful information, but most of the splits of larger auditoriums like that I've visited had sound transmission problems. Others may know of proven solutions, but in general for isolation the standard approach is double sheetrock on each sides of a sandwich stuffed with packed insulation, sheetrock hangers etc. to isolate the rock from the framing members, & making sure there are no spots with direct, mechanical connection from one side to the next.  |  IP: Logged Richard May Phenomenal Film Handler Posts: 1057 From: Floral Park, NY USA Registered: Aug 2004 posted 11-25-2005 07:20 AM                     The upstairs theater is transmitting sound into the downstairs theaters. Is there any kind of isulation material to cover the existing walls behind the screen and next to the screen. Opening the walls up is not an option now. There may be insulation in the walls but I cant be sure.  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 11-25-2005 08:27 AM                        Thinking of the upstairs theatre, you already have the stage and back wall in place and it is OK. Now add another backwall behind it and another stage floor below it. Remember these don't have to support very much; just themselves. These MUST NOT TOUCH any existing wall or floor. In this way, you have created a "sound wall" like that presently in use elsewhere characterized as a "staggered stud" wall. I have done 4 or 5 of these up/down splits back in the 70'2. None leaked sound; in fact what sound there was came down the steps from opened doors. Louis  |  IP: Logged Barry Hans Film Handler Posts: 92 From: Minneapolis, MN, USA Registered: May 2000 posted 11-25-2005 10:22 AM                        To stop transmission of sound one key element is mass. Concrete block filled with sand, Lead sheets, some thing that will not allow the sound to penetrate to the other side of the wall. The double wall idea is a good method. The more dead air between the internal surfaces of the walls the better.  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 11-25-2005 10:34 AM                     Also ensure the demising wall behind the screen of the balcony goes right to the roof deck as the attic is a common point for sound transmission  |  IP: Logged

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