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California Office of Noise Control 43 1980 <br /> Laboratory STC Section <br /> " Test Number Number <br /> Sketch Brief Description year <br /> Frequencies Tested <br /> Source of Data <br /> 1. 2. 3. 4. 5. 1. 2x4 studs, 16"o.c. .. Riverbank Acousti- 50 1.2.2.1.5.7 <br /> 2. 5/8"type X gypsum board nailed with 6d cal Labs. <br /> nails 8"o:c. TL 77-138 <br /> 3. resilient channels 24"o.c.and a 1/2"by 3" 1977 <br /> gypsum filler strip along the base plate. 16f <br /> v 4. 5/8"type X gypsum board screwed 6"o.c. Gypsum Association <br /> edges and 12"o.c. in field. <br /> 5. 3 1/2" thick sound attenuation blanket. <br /> 1. 2. 3. 4. 5. 1. 2x4 studs, 16"o.c. .. Geiger and Hamme 52 1.2.2.1.5.8 <br /> 2. 5/8"type X gypsum board screwed BW-35ST <br /> 12"o.c. 1969 <br /> 3. resilient channels, 24"o.c. l if <br /> 4. 5/8"type X gypsum board screwed at Gypsum Association <br /> edges and at center 12"o.c. <br /> -- - - - - 5. 3" thick sound attenuation blanket. <br /> Lt� 7>e Z <br /> 1. 2. 3. 1. 2x4 studs, 16"o.c. National Research 38 1.2.2.1.5.9 <br /> 2. resilient channels, 24"o.c. Council of Canada <br /> 3. 5/8"gypsum board screwed to channels. NRC#66 <br /> 1968 <br /> - - 16f <br /> National Research <br /> V\j- - Council of Canada <br /> 1. 2. 3. 1. 2x4 studs, 16"o.c. .. Riverbank Acousti- 45 1.2.2.1.5.10 <br /> 2. resilient channels 24"o.c, and a 1/2" by 3" cal Labs. <br /> gypsum filler strip along the base plate. TL 63-13 <br /> 5/8"type X gypsum board screwed 1962 <br /> 12o.c. l if <br /> Vy VA Gypsum Association <br /> 1. 2. 3. 4. 1. 2x4 studs, 16"o.c. National Research 50 1.2.2.1.5.11 <br /> 2. resilient channels, 24"o.c. Council of Canada <br /> 3. 5/8"gypsum board screwed to channels. NRC#66 <br /> 4. 2" thick sound attenuation blanket. 1968 <br /> 16f <br /> National Research <br /> Council of Canada <br />