Designed specifically for wood stud construction, NoiseReducer is a fiberglass batt insulation that breaks the path of sound vibration and absorbs noise. It can add four to 12 points to a Sound Transmission Class rating, the company says. Kraft-faced with tabs for easy attachment in interior walls, the product is 3 1/2 inches thick and 15 or 23 inches wide by 93 inches long.
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