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Jamison Sound Reduction Doors are measured using the latest ASTM E-90 test standards and the STC ratings defined by ASTM E-413. ASTM E-90 tests are comprehensive, requiring a fully operable door to ensure that the total panel, seals, frame, and hardware design are measured for transmission loss.

All Jamison Sound Reduction Doors are tested by the internationally recognized Riverbank Acoustical Laboratories of Geneva, Il. - the world’s first independent laboratory constructed for measuring the acoustical properties of architectural elements. With 75+ years experience, Riverbank is a frequently identified source for acoustical data in commercial, civic, and military specifications. The RAL facility and staff are annually certified and accredited by the National Voluntary Laboratory Accreditation Program (NVLAP) by the National Bureau of Standards of the U.S. Department of Commerce.