View Larger Image STC 2 Report No.494527Azeroasiapacific2021-04-30T03:34:47+09:00 PDF Related Projects Sound Transmission Loss Test and Classification of an Operable Door Sound Transmission Loss Test and Classification of a Double Leaf Door Influence of Seals in Sound Insulation Prediction of Steel Double Panel Doors image Sound Test STC51 Door with 770+565+361 Sound test STC51 Door with 370+565+361 STC 1 Report Mo.494527F STC 3 Report No.494527B STC 4 Report No.494527C