Stop Outside Noise to Enter Your Home
Noise enters your home in the same way air enters –through cracks and openings in your home’s exterior. Sound insulating your home is merely sealing up the points of air entry and in some cases increasing the mass through which noise must travel. A noise contour is generated by compiling all the aircraft flight information for an entire year. This information is entered into a computer that calculates noise levels, and generates a noise contour map which displays the day/night average noise level (DNL) in the areas surrounding the airport.
Windows
Old, loose-fitting windows that may rattle when a plane goes overhead or a truck or train passes are probably the greatest source of noise transmission in a home since the windows are in every room. Quality windows, installed in accordance with sound reduction construction procedures, using Soundproof Windows will give you the greatest benefit. If you do not wish to purchase new windows, adding storm windows or merely sealing your existing windows will help alleviate some air and noise transmission.
Replacement Windows
The windows being used in the City of Chicago’s Residential Sound Insulation Program are acoustically-rated windows with an STC (sound transmission class that denotes a material’s ability to resist sound transmission) rating of 40 to 44, depending on the home’s proximity to the airport. The combination of the glass layers, glass thickness and the air spaces between the Frameless Glass Partitions give the windows the acoustical rating. There are few window manufacturers that make “acoustic” windows. Genuine acoustic windows are tested by an accredited laboratory to obtain a certified Sound Transmission Class (STC) rating. When looking for acoustic windows, be sure to request a window with a minimum STC rating of 40.
The Chicago area has several manufacturers of good-quality thermal pane windows that will provide some noise relief. If you purchase thermal pane windows that do not have the storm windows built into the window unit, you should make sure they have wood or metal frames. Windows with wood or metal frames tend to be more compatible with storm windows. Vinyl windows typically are not as compatible with separate storm windows.
Storm windows with laminated glass provide better protection from noise than a non-laminated pane of glass. Increasing glass thickness al so improves acoustical performance. Be sure to check with your Window Manufacturer in Pune concerning compatibility regarding storm windows and your existing window units. Placing a storm window over any existing window may cause damage to either the storm or prime window.
As important as the quality of the window it is the method of installation. Most window installers do not install windows following sound reducing techniques. To obtain the full acoustical benefit, all voids around the windows must be filled with insulation and wood blocking, and the perimeter of the windows must be thoroughly caulked so no air can leak through.
Storm Windows
The combination of glass and air spaces increases the acoustical rating of window units. The addition of storm windows over your existing windows will increase the acoustical rating. It should be noted that storm windows should not be installed over vinyl-framed windows. The heat build-up from the sun between the panes of glass may cause the vinyl to warp. Acoustical storm windows are usually constructed with 3/16” or ¼” laminated glass.
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