Acoustic Data



Viracon Acoustical Glass is made from combinations of various glass types along with acoustical window frames to help you effectively reduce sound transmission from airplanes, trains, vehicles and other unwanted noises. The performance data below applies to an insulating unit constructed with two plies of glass and an air or argon filled space. Data is based on testing ~36" x 84" glass to ASTM E413-87 in an acoustical wall. *OITC is estimated based on this test. Glass size and glazing system will affect STC rating. See additional notes below data for specific details.

The STC (Sound Transmission Class) rating is a single-number rating system for interior building partitions and viewing windows used to categorize acoustic performance. Its original intent was to quantify interior building partitions not exterior wall components. As a result it is not recommended for glass selection of exterior wall applications since the single-number rating was achieved under a specific set of laboratory conditions.

The OITC (Outside-Inside Transmission Class) rating is used to classify acoustic performance of glazing in exterior applications.

Download a printer-friendly PDF of the Acoustic data.


Glass MakeupGlass MakeupFrequency (Hz)
Construction Glass PlyInterlayerAirspaceGlass PlyInterlayerAirspaceGlass PlyInterlayerGlass Ply Glass PlyInterlayerAirspaceGlass PlyInterlayerAirspaceGlass PlyInterlayerGlass Ply STC OITC* 100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000
Sound Transmission Loss (dB)
Insulating1/8"1/4"1/8"3mm6mm3mm 28 26 26 21 23 23 26 21 19 24 27 30 33 36 40 44 46 39 34 45
Monolithic1/8"3mm 30 25 19 17 18 21 23 22 24 27 28 30 30 32 34 35 36 33 26 30
Monolithic1/4"6mm 31 29 23 25 25 24 28 26 29 31 33 34 34 35 34 30 27 32 37 31
Insulating1/8"3/8"1/8"3mm10mm3mm 31 26 26 23 23 20 23 19 23 27 29 32 35 39 44 47 48 41 36 43
Laminated1/8".015"1/8"3mm.38mm3mm 33 30 27 23 27 24 27 28 29 31 33 35 35 35 33 31 32 37 41 45
Monolithic3/8"10mm 34 32 26 27 27 30 32 31 34 35 36 35 33 30 30 35 38 41 46 48
Laminated1/8".030"1/8"3mm.76mm3mm 35 31 25 26 28 27 29 29 30 32 34 35 35 36 36 35 35 38 43 46
LaminatedS/S.030"S/S2.5mm.76mm2.5mm 35 31 29 29 29 25 27 29 29 31 32 34 34 34 34 35 33 36 39 41
Laminated1/8".045"1/8"3mm1.14mm3mm 35 31 24 27 27 28 28 29 30 32 34 35 36 36 37 36 35 38 43 46
Laminated1/8".060"1/8"3mm1.52mm3mm 35 31 25 25 26 29 28 30 30 32 34 35 35 36 36 36 36 39 43 46
Insulating1/4"1/2"1/4"6mm12mm6mm 35 30 27 24 29 22 22 25 30 33 35 38 40 42 42 37 37 43 46 49
Monolithic1/2"12mm 36 33 26 30 26 30 33 33 34 36 37 35 32 32 36 40 43 46 50 51
Laminated3/16"0.15"3/16"5mm.38mm5mm 36 32 27 25 26 30 31 31 33 35 35 35 35 33 33 37 41 44 48 51
Laminated3/16".030"3/16"5mm.76mm5mm 36 33 27 27 27 30 31 31 33 34 35 36 36 35 34 37 41 45 49 52
Laminated1/4".030"1/8"6mm.76mm3mm 36 33 27 28 26 30 31 31 32 34 35 36 36 35 35 36 40 44 48 51
Laminated1/4".015"1/4"6mm.38mm6mm 36 32 25 25 27 30 32 32 34 35 35 35 33 32 35 40 43 46 49 51
Laminated1/4".090" SentryGlas1/4"6mm2.29mm SentryGlas6mm 36 34 31 30 29 31 32 33 33 34 35 35 34 32 34 37 40 42 44 47
Laminated1/4".075" VancevaStorm1/4"6mm1.95mm VancevaStorm6mm 36 35 27 30 30 31 31 33 32 33 34 35 35 34 36 40 43 45 47 47
Insulating Laminated3/16"3/8"1/8".030"1/8"5mm10mm3mm.76mm3mm 37 31 27 27 26 24 22 28 32 35 38 38 39 40 42 43 41 45 52 57
Laminated1/4".060"1/8"6mm1.52mm3mm 37 33 27 28 27 30 31 31 33 35 36 37 37 37 36 37 41 44 48 51
Laminated1/4".100" StormGuard1/4"6mm2.53mm StormGuard6mm 37 35 32 31 30 31 33 34 34 34 35 36 35 35 37 41 44 47 49 51
Insulating1/4"9/16"3/16"6mm15mm5mm 37 30 32 26 25 20 24 29 33 34 38 41 43 46 46 42 36 43 48 53
Insulating5/16"1/2"5/16"8mm12mm8mm 37 32 26 24 25 31 24 32 32 35 37 39 39 38 36 38 42 44 46 49
Insulating1/4"1"1/4"6mm24mm6mm 37 30 22 19 27 23 31 30 35 35 36 39 41 42 41 36 37 46 51 56
Insulating3/8"1/2"3/8"10mm12mm10mm 37 32 29 23 23 29 31 34 34 35 36 36 35 35 36 40 43 47 49 48
Laminated1/4".030"1/4"6mm.76mm6mm 38 34 25 29 28 30 33 33 34 36 37 37 37 36 37 41 45 48 51 53
Laminated1/4".045"1/4"6mm1.14mm6mm 38 34 26 30 27 30 33 33 34 36 37 38 37 36 37 41 45 48 51 54
Insulating1/4"1/2"5/16"6mm12mm8mm 38 33 30 24 29 26 29 33 34 36 39 41 41 40 38 37 39 43 46 48
Insulating1/4"3/4"1/4"6mm19mm6mm 38 31 27 23 28 21 27 29 34 35 37 41 43 45 44 39 39 46 49 52
Insulating Laminated3/16"1/2"1/8".030"1/8"5mm12mm3mm.76mm3mm 39 31 26 23 25 23 27 31 34 36 38 39 41 43 45 46 43 49 55 55
Insulating Laminated1/4"1/2"1/8".030"1/8"6mm12mm3mm.76mm3mm 39 31 28 20 29 24 26 30 34 36 39 42 43 44 44 41 40 47 52 56
Laminated1/4".060"1/4"6mm1.52mm6mm 39 34 26 29 28 30 33 33 35 36 37 38 38 37 38 41 44 47 51 54
Laminated1/2".030"1/4"12mm.76mm6mm 39 36 31 35 33 33 34 36 36 37 36 35 34 39 41 46 48 50 52 56
Insulating1/4"1/2"3/8"6mm12mm10mm 39 34 28 26 32 29 29 31 35 37 38 39 41 43 41 40 41 44 47 49
Insulating5/16"1/2"3/8"8mm12mm10mm 39 34 29 26 26 31 30 37 36 37 39 39 40 37 35 39 43 46 48 49
Insulating Laminated1/4"1/2"1/4".075" VancevaStorm1/4"6mm12mm6mm1.95mm VancevaStorm6mm 39 34 29 25 30 27 31 34 35 34 36 38 40 41 42 43 44 47 50 49
Insulating Laminated1/4"1/2"1/4".090" SGP1/4"6mm12mm6mm2.29 SGP6mm 39 34 29 24 32 27 32 34 35 34 36 38 40 40 41 41 42 46 48 49
Triple Insulating1/4"1/2"1/4"1/2"1/4"6mm12mm6mm12mm6mm 39 31 25 22 29 24 25 29 34 37 40 43 46 48 47 41 41 47 52 58
Laminated3/8".030"1/4"10mm.76mm6mm 40 36 29 30 28 32 34 35 36 38 38 38 36 38 42 46 49 52 55 57
Insulating Laminated1/4"1/2"1/4".030"1/8"6mm12mm6mm.76mm3mm 40 30 28 17 28 29 33 34 38 40 40 41 41 41 41 40 43 49 54 58
Insulating Laminated1/4"7/16"3/16".030"3/16"6mm11mm5mm.76mm5mm 40 33 31 25 30 27 29 34 36 37 39 40 42 43 42 41 44 47 51 51
Insulating Laminated1/4"1/2"1/4".100" StormGuard1/4"6mm12mm6mm2.53mm StormGuard6mm 40 34 28 23 30 28 32 35 36 36 37 39 41 43 43 43 45 48 50 49
Insulating Laminated1/4"1"3/16".030"3/16"6mm25mm5mm.76mm5mm 40 32 24 24 31 28 33 36 37 39 39 40 41 41 41 42 43 47 49 47
Insulating1/4"3/4"3/8"6mm19mm10mm 40 33 30 23 31 28 33 37 39 40 41 39 38 38 39 39 40 47 51 53
Laminated1/2".060"1/4"12mm1.52mm6mm 41 36 29 30 29 32 35 35 37 38 38 38 37 41 44 48 50 53 56 56
Insulating Laminated1/4"1/2"1/8".060"1/8"6mm12mm3mm1.52mm3mm 41 32 24 23 28 26 28 33 36 37 39 42 44 46 46 43 44 50 53 55
Insulating Laminated1/4"1/2"3/16".030"3/16"6mm12mm5mm.76mm5mm 41 35 32 27 29 28 31 35 37 39 41 42 43 44 43 42 45 50 53 54
Double Laminated Insulating1/4".030"1/4"1/2"3/16".060"3/16"6mm.76mm6mm12mm5mm1.52mm5mm 41 35 32 25 29 31 33 35 37 38 39 39 40 41 42 43 43 44 45 46
Triple Insulating1/4"1/2"1/4"1/2"3/16".030"3/16"6mm12mm6mm12mm5mm.76mm5mm 41 33 24 25 31 29 31 36 37 39 39 41 41 42 42 43 44 48 50 49
Insulating Laminated1/4"1/2"3/16".060"3/16"6mm12mm5mm1.52mm5mm 42 35 30 29 31 28 31 34 37 39 41 42 44 46 45 44 47 52 55 60
Insulating Laminated1/4"1/2"1/4".060"1/4"6mm12mm6mm1.52mm6mm 42 34 29 24 30 29 32 37 40 40 41 42 44 45 44 45 48 53 57 59
Insulating Laminated1/4"5/8"3/16".060"3/16"6mm16mm5mm1.52mm5mm 42 35 29 24 30 29 32 37 40 40 41 42 44 45 44 45 48 53 57 59
Double Laminated Insulating1/8".030"1/8"1/2"1/8".030"1/8"3mm.76mm3mm12mm3mm.76mm3mm 42 33 26 21 29 28 30 34 36 40 42 44 44 44 45 46 47 52 57 58
Double Laminated Insulating5/32".030"5/16"1/2"5/32".030"1/4"4mm.76mm8mm12mm4mm.76mm6mm 42 35 29 24 30 35 35 37 39 39 40 40 40 39 44 48 52 56 59 61
Double-Glazed Applications1/8".030"1/8"1"3/16"3mm.76mm3mm25mm5mm 42 33 22 27 27 28 31 35 38 41 42 43 44 45 47 47 45 50 58 61
Insulating Laminated1/4"1/2"1/4".030"1/4"6mm12mm6mm.76mm6mm 43 36 31 29 32 30 32 35 38 40 40 42 44 46 47 46 47 52 56 61
Insulating Laminated5/16"5/8"3/16".060"3/16"8mm16mm5mm1.52mm5mm 43 37 28 28 34 36 33 40 41 42 43 43 42 40 40 43 49 53 57 61
Insulating Laminated3/16"11/16"3/8".030"3/16"5mm17mm10mm.76mm5mm 43 35 27 27 29 29 30 35 39 40 41 42 43 46 50 52 50 53 57 59
Insulating Laminated3/8"3/4"1/4".060"1/4"10mm19mm6mm1.52mm6mm 43 37 25 31 38 33 37 39 42 43 43 42 40 40 41 56 50 55 58 61
Double Laminated Insulating1/4".030"1/4"1/2"5/32".060"5/32"6mm.76mm6mm12mm4mm1.52mm4mm 43 36 30 25 29 33 34 38 42 42 43 44 42 41 42 44 49 52 55 57
Insulating Laminated1/4"3/4"3/16".060"3/16"6mm19mm5mm1.52mm5mm 44 36 28 26 32 30 35 37 40 41 43 44 45 47 47 44 47 53 57 60
Insulating Laminated1/4"3/4"1/4".060"1/4"6mm19mm6mm1.52mm6mm 44 37 28 29 36 32 34 39 41 41 41 43 44 45 45 46 47 52 56 61
Double Laminated Insulating1/4".060"1/4"3/4"3/16".030"3/16"6mm1.52mm6mm19mm5mm.76mm5mm 44 33 21 23 31 35 37 40 42 42 43 42 42 42 44 48 51 55 57 59
Double Laminated Insulating1/4".060"1/4"3/4"1/8".030"1/8"6mm1.52mm6mm19mm3mm.76mm3mm 44 37 32 26 35 35 35 40 41 42 42 43 44 44 45 47 50 56 54 45
Double-Glazed Applications1/8".030"1/8"2"3/16"3mm.76mm3mm50mm5mm 45 35 24 25 34 33 34 40 41 44 44 46 47 47 48 48 46 50 55 56
Double-Glazed Applications1/4".030"1/4"1"1/8".060"1/8"6mm.76mm6mm25mm3mm1.52mm3 46 35 21 28 33 37 38 42 43 45 44 44 44 45 49 53 57 59 62 63
Double-Glazed Applications1/4".030"1/4"2"3/16"6mm.76mm6mm50mm5mm 46 39 27 36 33 33 35 39 41 45 45 46 46 46 49 51 52 56 60 62
Double-Glazed Applications1/4".030"1/4"2"3/8"6mm.76mm6mm50mm10mm 46 42 34 37 33 38 40 42 44 48 47 46 45 52 56 51 55 59 61 62
Insulating Laminated3/8"1"1/4".060"1/4"10mm25mm6mm1.52mm6mm 46 36 24 30 33 35 40 41 44 45 45 44 44 44 43 46 50 54 57 58
Double-Glazed Applications1/8".030"1/8"4"3/16"3mm.76mm3mm100mm5mm 48 39 26 36 34 37 37 43 44 48 49 51 51 50 51 50 47 51 58 60
Double-Glazed Applications1/4".030"1/4"4"3/16"6mm.76mm6mm100mm5mm 49 41 30 37 33 38 37 42 45 49 50 51 50 48 50 53 58 57 61 64
Double-Glazed Applications1/4".030"1/4"4"3/8"6mm.76mm6mm100mm10mm 49 44 38 38 33 40 40 43 46 51 52 52 50 45 48 53 56 59 62 64
Double-Glazed Applications1/2".060"1/4"4"1/8"12mm1.52mm6mm100mm3mm 49 40 29 33 31 36 38 43 44 46 47 49 50 52 52 55 59 59 58 60
Double-Glazed Applications1/4".060"1/4"4"1/4".030"1/4"6mm1.52mm6mm100mm6mm.76mm6mm 50 43 31 39 35 39 41 43 46 51 52 52 49 48 50 54 59 61 63 64
Double-Glazed Applications1/2".060"1/4"4"1/4".030"1/4"12mm1.52mm6mm100mm6mm.76mm6mm 50 43 31 42 33 40 42 43 46 50 50 50 49 50 52 55 60 62 64 64
Double-Glazed Applications1/4".030"1/4"4"1/8".030"1/8"6mm.76mm6mm100mm3mm.76mm3mm 51 44 34 38 34 40 41 45 47 51 52 53 53 51 52 55 58 60 62 64


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