Laminated glass stc rating calculator. 76 40 Duo Plus™ IGU with Laminated PVB mm Rw .
- Laminated glass stc rating calculator Constructed with laminated or insulated glass, their soundproofing improves, and STC Find the weight of any volume of glass material made from the most common glass types in production today using this glass weight calculator. 2110. Read more about the tools below, or register and start using Glass For better sound reduction, we also offer laminated glass with an STC of 38, which further lowers the sound level to 22dB, making it perfect for focused work or private meetings. In addition to STC, another popular method of measuring a weighted average is the weighted sound reduction index R w. Consider that an average exterior wall of a stick-built home has an STC It is comprised of three layers bonded together. STC rated Glass size and glazing system will affect STC rating. For example, R (C; Ctr ) = 40 Cardinal's laminated glass offers sound dampening, reducing audio decibel levels in high-noise areas. 030"/ 3. R:Insulated glass STC. Glass Analytics online tools offer a comprehensive suite of engineering and analytical reports that demonstrate the advantages of high-performance glass in building facades. 76 , 9. * * [The data and information set forth are based on samples tested and are not guaranteed for all samples or applications. To find out the best windows and their glass STC rating chart, contact the best window company in Toronto such as Vinyl Light. Read more about the tools below, or register and start using Glass The resulting data is then used to calculate the STC rating using standardized formulas. At this time, the American Society for Testing and Materials (ASTM; Now ASTM International), was developing a rating called Sound Transmission Class (STC). the sound transmission class rating (STC) to describe the sound isolation performance of materials. In the past, STC was used as a preliminary comparison of various glazing materials. 76 , 17. 8 Pilkington Optiphon™ 20,8 42 -1 -3 20. It is manufactured by permanently bonding two or more lites of glass with layers of polyvinyl butyral (PVB) interlayer, under heat and pressure, to create a single construction. Additional advantages of laminated glass include: Figure 1: shattered laminated glass • In thicker, multi-layer forms, laminated glass can be blast and bullet resistant. To illustrate, the STC value for a monolithic 6mm glass is 31, for an insulated 24mm glass is 35 and for a 13. The laminated glass interlayer should be of a thickness and type designed for optimum acoustic performance (e. ] SVC Rw summer TL 85-198 TL 85-170 - - TL 85-234 TL 85-229 TL 85-225 - - TL 85-228 - - TL 85-230 TL 85-213 SF6 the overall STC rating of the glass can be improved by as much as 3 points. • WD66 with STC Can Low Emissivity Glass Be Laminated? Glass lamination is a tough plastic layer made from polyvinyl butyrate (PVB) and applied to the inside of the glass layers, creating a more durable and higher-performance window. Some examples of STC STC Example : ¼” Monolithic glass has an STC of ~31dB. ,LTD YourturnkeyChinatemperedglass/laminatedglass/insulatedglasssupplier Add: Rom A3 04,S he ngx ifu ad N O. STC. ) based on its ability to reduce sound coming through it. 2021 By Garibaldi Glass Cardinal 366 - Guardian SNX 62/27 - Viracon VNE-63 - Vitro Solarban 70 In addition, when the laminated glass makeup includes a coating facing the interlayer material, there may be a loss of thermal Sound Transmission Class (STC) is a single-number quantity which characterizes the airborne Location 6601 NE 112th Court Vancouver, WA 98662. The STC (Sound Transmission Class) rating is a single-number rating system for interior building partitions and viewing windows used Laminated Glass Construction STC OITC* 100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 Sound Transmission Loss (dB) 1/4 These tests measure sound transmission loss through the product at various frequencies, which is then used to calculate the STC rating. Laminated Glass Applications to provide conservative estimates of required STC or Rw ratings to be used by the building designer as a planning tool for window glazing. 5540. 38 34 8. 1) - PVB 34 8. The performance of the final The calculator is free to architects and engineers and gives them the ability to compare a variety of glazing components and technologies to determine optimal glazing configurations to meet specific acoustic performance targets. Laminated Glass Construction. Users will need to satisfy themselves that the results are reasonable for their purposes. Glass and Solar Energy; Green Resources; Our Solar Commitment; The STC value for a monolithic 6mm glass is 31, for an insulated 24mm glass is 35 and for a 13. Email: info@commercial-acoustics. Laminated & Double-Glazed Glass. Gaps or weaknesses in the frame can compromise the STC rating. g. Estimated Glazing Type STC ¼” Tempered Safety Glass 31 ½” Tempered Safety Glass 36 ¼” Laminated Safety Glass 35 ½” Laminated Safety Glass 38 1” Insulated (¼” Lite, ½” air space, ¼” lite) 35 Source: Monsanto Acoustical Glazing Design Guide, 3rd Edition stc_rating_chart. Products; Technical Bulletins; Sustainability. 8 Pilkington Optiphon™ 10,8 38 -1 -3 10. 030" P. TD-138 - Heat Treated Glass for Architectural Glazing Single Laminated PVB mm Rw 6. 2 safety and security mega-trend: need for reducing risk 1. Laminated glass: 35-38: Noises can be barely heard. • WD65 with STC 38 laminated glass has an STC of 36. Search for suitable solutions based on glazing parameters and acoustic requirements. The answer to a noise concern is not less glass, but the use of innovative laminated safety glass made with Saflex™ Acoustic PVB interlayer. STC ratings are used for windows doors, walls & most building materials. STC For a typical single pane window you can expect a STC Rating of 18-20. 38 35 11. 1/ 0. If thicker glass material is used, the rating can go up to 35. In both laminated and double-glazed glass, the STC Double-glazed glass can also achieve an STC rating of up to 40. However, depending on the goals for acoustical attenuation, it may be benefi cial to test the Sample STC 3. What is the STC rating of 12mm glass? Laminated glass is a proven, effective solution for acoustical protection. The world’s first acoustic calculator based STC rating (Sound Transmission Class rating) is a score given to a building’s surface (wall, ceiling, window, etc. QINGDAOMORNBUILDINGMATERIALSCO. 4 types of laminated safety glass interlayers 1. 1 mm) 1/4" laminate 1/2", Air 1/4" 39 39 Laminated glass is very effective in reducing the transmission of noise through glazing as it has a higher sound reduction index than monolithic glass (of equal thickness), particularly between 125Hz and 4000Hz. Refer to Table 2 for representative STC ratings. Case Studies Overview. The Energy Savings view provides savings as overall percentages based on a 15% window-to-wall ratio and comparing the selected insulating glass configurations to 2 pane clear glass insulating glass units. 29W b D3s trcQ C6 MKETIG@ A leader in tools for the glass industry. 4800. STC is highly dependant on the construction of the partition. The For instance, if you recorded 16 different frequencies, divide your total by 16. Vitro Architectural Glass | 400 Guys Run Road Cheswick, PA 15024 USA | ©2001-2025 Vitro Flat Glass llc Glass Product Type and Thickness STC Rating OITC Rating Monolithic 3/ 32 ” 26 - 1/ 8 ” 29 - ¼” 31 29 ½” 36 33 Sealed Insulating Glass Units 1/ 8 ” glass + ¼” air + 1/ 8 ” glass 28 26 ¼” glass + ½” air + ¼” glass 35 28 ¼” glass + 1” air + ¼” glass 37 A leader in tools for the glass industry. . 1/8" 35 35 with a lot of glass which must achieve a specific STC rating. Soda lime silicate glass. See more Welcome to our interactive glass selector tool where you can find glass that meets your performance requirements. A barrier’s OITC rating is measured using data gathered over an 80 to 4000 hertz frequency range. All performance data is calculated using LBNL Window 7. 24 Page 1 of 7 Due to continual product research and development, Glass 3 Spacer STC OITC Test Date Number Operating Style Series Numbers Tested Size OA Glass 1 Glass 2 1/8 1/8 - x <-- HELP ME CHOOSE - ACOUSTIC GLASS The STC and OITC rating measures a window’s ability to block sound transmission. -1/8" (total 3/8" thick), 1/4"-0. R:laminated glass STC. 11F P. In other words, acrylic stops less sound from passing through than The ASTC rating of the complete building system and the STC and Flanking STC ratings of the separating and flanking assemblies are displayed at the top of the page. Additionally, laminated glass The average STC rating for a regular single pane window is 27. 060" PVB, 1/4" glass Laminated Glass Construction STC OITC 100 125 160 00 2 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 Frequency (Hz) Sound Transmission Loss (dB) LAMINATED ACOUSTICAL DATA STC Ratings Chart Acoustical Performance of Glass and Wall Constructions Overall Thickness Inside Construction Space Outside STC Value ISO RW 3 Single Laminated Glass 1 Laminated- Insulating Glass 2 1" (26. Use the tabs underneath the results to navigate to the detailed assembly descriptions and to change the assemblies according to your needs. Guardian Glass has developed easy-to-use, advanced software for glass and glazing system analysis. 5200. The higher the STC rating, the more sound will be dampened. 52 39 20. The difference in sound levels is used to calculate the STC rating. Glass Kits: If your door includes glass panels, the type and thickness of the glass will affect the STC rating. 2000. The principle of the test was to send higher STC ratings. Your STC calculation should fall between the range of 20 to 65, with 20 indicating the most noise transmission and 65 indicating the least noise transmission. 5 fi berglass insulation batts, ⁄8" None TL-92-618 38 5 designed to deliver noise control ⁄8" Glass fi ber TL-93-325 49 5 in metal stud STC rating, the more able the material is to resist the transmission of sound. The order of sound insulation performance from poor to excellent is: 1/4” (6mm) monolithic glass has an STC rating of 31 1/8” x . When combined with a hermetically-sealed IG unit, the acoustical benefits to your windows STC is a widely recognized measure for sound insulation in windows and doors, focusing on human speech frequencies. November. Acoustic grade acrylic inserts have a lower STC rating than acoustic grade laminated glass. txt) or read online for free. Quartz. The performance calculator simplifies the creation of glass make-ups through a point-and-click, web-based interface. 8mm Sea-Storm How to Calculate the Glass STC - Free download as PDF File (. 24 mm) 1/8" 0. Call: (360) 334-4107 Some STC ratings of common window assemblies are listed below. 36 . Strong enough to withstand repeated blows from hammers, bricks and other objects, laminated products deter forced entry and provide greater peace of mind. In general, it is believed that a higher STC rating is preferable. 1/2" Clear Laminated Glass . STC Ratings Chart Acoustical Performance of Glass and Wall Constructions Overall Thickness Inside Construction Space Outside STC Value ISO RW 3 1/4" (7. com. Red ornamental. However, standard PVB is a soft polymer that starts to creep under long-term loads. This document provides sound transmission class (STC) ratings for various glass and wall constructions. Outside-Inside Transmission Class (OITC)—measures sound transmission of low- to mid-frequency noises through exterior If you are unsure of what rating would work for your project, there are some standards you can go by in helping you to determine your target range. Laminated and double-glazed glass both hold STC ratings of 40, but anything higher typically calls for a combination of the two. The goal is to create such a high-performance product that an assembly’s STC rating is the same as that of a solid glazed wall. This standard has levels of attack using a Thinner glass has a low STC rating because sound travels through it easily. Username. Its composition helps to reduce sound vibrations, improves STC ratings, and often is used in How to calculate an STC or OITC rating; STC versus OITC. Increasingly, laminated glass is required in railing systems as well as hurricane, impact and blast resistance applications by many specifications and/or building codes. 2. In general, a higher STC rating blocks more noise from transmitting through a partition. the thickness of the glass, and how airtight they are. For reference, standard house walls are 33 STC, while studio-level soundproofing STC rating 3/8" Clear Laminated Glass . Password OA Glass 1 Glass 2 Acoustical Ratings - Tuscany I V400 updated 09. To get started, input your required performance data below. and the resulting curve is used to calculate the rating. provided by a particular glass type. Glass Appearance: Clear. Laminated insulated glass. The tables below include a selection of the most common colors available. Laminated glass with an air pocket is often recommended for better soundproofing. Both C and Ctr are generally negative and deducted from Rw to calculate noise reduction property of the material. A detailed discussion of the methodologies and supporting analytical rationale are provided in Section 4. Once the data is collected, professionals calculate a barrier’s OITC rating in accordance with standards laid out by the American Society for shear forces) due to the glass sheets. Its original intent was to quantify interior building partitions, not exterior wall components. pdf - Free download as PDF File (. 76 40 Duo Plus™ IGU with Laminated PVB mm Rw • All values shown are glass only. Laminated glass provides security for both homes and businesses. Decorative laminated glass promotes productivity, natural light, and enhanced Sound Transmission Class (STC) ratings, along with unparalleled aesthetics for display cases, modular walls, dividers, and partitions within retail, personal care, office, and hotel settings. Glass weight estimator tool. CE Certification . LoĒ Color Simulator. 76 , 13. August. This value represents your STC rating. -1/4" (total 1/2" thick), Laminated Glass: Laminated glass consists of multiple layers of glass with an interlayer, usually made of polyvinyl butyral (PVB). Generally, a higher STC rating is thought to be better, but it’s also important to consider that many sources of noise complaints are below The STC (Sound Transmission Class) rating is a single-number rating system for interior building partitions and viewing windows used to categorize acoustic performance. Insulated glass/double glazed units. OITC, on the other hand, covers a broader frequency range (80 to 4000 Hz), including lower frequencies often associated with external noise. For example, laminated glass has a rating of around 35, but it can go up as far as to 41 if you use thicker layers of glass and PVB. 8 Sound Attenuation Batt Insulation Product Data Sheet Description Acoustic Comparison of Cavity Insulation Types Sound Attenuation Batts (SAB’s) Gypsum Board Insulation Type Test Number STC are unfaced, lightweight, fl exible One layer each side. The first measure of acoustic performance is referred to as the Sound Transmission Class or STC. Always specify the minimum required STC for laminated glass rather than simply specifying “laminated glass” of a specific thickness. This AIS Glass’ software helps you to calculate the acoustic insulation & configurations like glass thickness, thermal breakage, etc. To achieve even higher STC Ratings, window manufacturers may offer the addition of laminated glass, • SL45 with STC 40 laminated glass has an STC of 36. The Comfort Analysis view allows you to vary the window sizes on the wall, to best match your home design. 9600. 8 Pilkington Optiphon™ 16,8 41 -1 -3 16. Measured on a numerical scale, a higher number means less exterior noise inside your home. At JELD-WEN, for example, we offer a variety of dissimilar glass combinations on our Vinyl windows that carry up to an STC 34 rating. 3 safety glass: tempered glass vs laminated glass 1. STC and OITC are standards that measure sound attenuation. This ‘dip’ means more noise is let through at these frequencies Generally, yes. Discusses the acoustical properties of glass, methods of rating, such as STC and OITC, applicable standards and the relationship between glass and other glazing components in determining an overall rating. Fort Wayne Project. Therefore, laminated safety glass produced with PVB interlayer provides excel-lent protection against, for example, the effects of vandal-ism, hurricanes or explosions. It lists the construction details and thickness of single laminated glass, laminated insulating glass, airspaced glass, monolithic glass, and various wall constructions. OITC* Frequency (Hz) 100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500. 030 P. Roseville Project. 52 , 10. 2 L aminated Glass is a multifunctional glazing material that can be used in a variety of applications. Both STC and OITC ratings inform your window or door selection based on sound insulation Laminated safety glass produced with Sound Control offers outstanding complementary operational properties too, in terms of safety, long-term stability, light fastness, and appearance. This patented, tri-layer system targets sounds in the 1000–4000 Hz range (an area sensitive in human hearing) for superior sound damping in laminated safety glass. • SL80/81 has an STC rating of 38 when using double insulated laminated STC 38 glass, and a rating of 45 when using double laminated STC 45 glass. Sign in with your username and password. Your STC estimate should fall between 20 and 65, with 20 representing the highest level of noise transmission and 65 indicating the lowest level. Widely used STC (Sound Transmission Class) measures frequencies from 125 Hz Energy + Comfort Calculator. 5 conclusions 2 a guide to designing in laminated Laminated glass provides higher mechanical resistance and security benefits. Laminated Glass Details and Applications While STC Rating FINO 3/8" Tempered Glass & 1/2" Laminated Glass 43-46 MIMO 3/8" Tempered Glass & 1/2" Laminated Glass 43-46 Glazed Assemblies STC Ratings The opening of an assembly is the weakest point for sound transmission. This metric measures the sound levels for interior building partitions where the Click "Next" to move to the next layer and click "Calculate" to finalize your configuration. All performance data is determined using LBL The performance data below applies to laminated glass units constructed with two plies of glass and an interlayer. The STC (Sound Transmission Class) rating is a single-number rating system for interior building partitions and viewing It’s a type of laminated glass that includes a layer of acoustically-insulated layer to absorb sound waves and reduce noise transmission. 52mm laminated glass is 39. As a result, two glass sheets laminated together using A specific method is used to calculate how much sound of various pitches passes through a partition. GLASS TYPE What Are STC Ratings?Sound transmission class (STC) labels to specify how partitions and walls block sound and reduce noise. 38 36 12. This adds strength and blocks sound waves giving laminated glass an STC rating of around 40. Double glazed windows are a bit superior for blocking sound, with an average rating of 29. As discussed in Section 2, STC ratings and the Rw for most glass configurations are equal. Silica glass. 52 , 12. 030 x 1/8” laminated has an STC rating of 34 1” insulated glass ¼” x ½” AS x ¼” has an STC rating of 35 Structural Performance The strength of laminated glass is determined by the glass thickness, type of vinyl, glass size, and the nature of loading. Although laminated glass is effective at reducing noise transmission, how does it compare to other types of glass? Traditional uses may include laminated glass in overhead glazing, sound damping, and safety and security applications. 38 . SOUNDPROOFING INFORMATION 1 - Low-e coatings do not affect This calculator makes it easy for you to perform preliminary assessments of the Wind Load resistance of single glazed, annealed (not heat treated) window glass, with various edge support conditions, according to the ASTM E 1300 standard. B. Sound Transmission Class (STC)—measures sound transmission of interior spaces with frequencies ranging from 125 to 4000 Hz; higher STC numbers mean less sound is transmitting beyond an interior space. 1 introduction 1. 2700. 8 Pilkington Optiphon™ 12,8 40 -1 -3 12. 38 32 6. Check with your framing system supplier for total window values. 03. Tempered glass. Multiple configurations can be added to the list by clicking "Calculate – Compare Additional Products" after building the next configuration. Window glass. 52 37 16. Testing and Rating for Intruder Resistance, Part 1 – Intruder resistant panels). The first records of measurements for the acoustic evaluation of laminated glass date back to 1968. Seals and Gasketing: Even the highest-rated door will perform poorly without effective We would like to show you a description here but the site won’t allow us. A brick wall will stop more sound than a paper wall – that’s obvious. This rating is based on how much sound is blocked across a range of frequencies, The number you calculate is your STC rating. 1 laminated safety glass 1. This table compares Vitro Architectural Glass product performance data when assembled in a one-inch (25 mm) insulating glass unit with a ½-inch (13 mm) air space and two ¼-inch (6 mm) lites. This calculator allows you to estimate the weight of individual glass components and configurations based upon the nominal thickness, shape, size, type and number of glass panes being considered. 2021 By Garibaldi Glass Guardian AG 43 - Viracon VRE-46 Make-up Name Make-up Icon In addition, when the laminated glass makeup includes a coating facing the interlayer material, there may be a loss of thermal Sound Transmission Class (STC) is a single-number quantity which characterizes the airborne sound insulation The Sound Transmission Class (STC) is a single-number rating of a material's or an assembly's ability to resist airborne sound transfer at the frequencies 125-4000 Hz. By comparison, a ¼” laminated glass has an STC rating of ~34 dB. Use the calculator to model the thermal and optical properties for your glass Phone: 888-815-9691. Double Glazed solid wall STC Ratings . Data is based on testing ~36" x 84" glass to ASTM E413-87 in an acoustical The Strength Lab AI-Tool is believed to give adequate estimates of acoustic properties of laminated glass based upon best engineering judgment and practices, but NO claims are For monolithic, laminated or insulating glass unit performance data, please go to SystemSelect ™, our on-line glass performance calculator. Typical dual glazed windows can achieve better ratings of 25-27. Glass size and glazing system will affect STC rating. CALCULATOR 26. Two outer layers of glass surround the center layer of special adhesive. • SL60 with STC 38 laminated glass provides an overall STC of 36. What would be an average STC rating for a double pane window with low-e and one pane of lamination (if there is such a thing Acoustical Performance of Glass and Wall Constructions Overall Thickness Inside Construction Space Outside STC Value ISO RW 3 1/4" (7. The insulating glass units are constructed with two plies of glass and an airspace. TD-136 - Recycled Glass Use An explanation of Vitro Glass's use of recycled glass. One of the features of glass is sound proof,whether it’s single glazing, laminated glass,insulated glass or even laminated insulated,the glass can reduce the sounds transferrd from outdoor to indoor. As a result, it is not recommended for glass selection of exterior wall applications since the single-number rating The STC (Sound Transmission Class) is a rating system for interior building partitions and viewing windows used to . The two product graph lines follow each other closely but the ordinary laminated glass dips significantly, close to 10dB. ** The laminated glass position will be dependent of the type of low-e used. Hermetically sealed IG units paired with laminated glass perform well in ASTM sound transmission ratings. Laminated glass. Figure 1. OITC FLOAT GLASS The STC rating of a single. pdf), Text File (. Windrose Project. STC Calculate the typical transmission loss: divide the total number of frequencies you tested by the sum of all the frequencies you recorded. , Saflex Acoustic PVB). What Is a Good STC The Strength Lab AI-Tool is believed to give adequate estimates of acoustic properties of laminated glass based upon best engineering judgment and practices, but NO claims are made as to the accuracy of the results obtained. -1/8" (total 1/4" thick), 1/4"-0. • Laminated glass can be drilled, cut and otherwise modified in the shop or field, increasing fabrication In fact, dual-pane windows with dissimilar glass can achieve STC ratings nearly as high, if not as high, as triple-pane or laminated glass. Sound Control Laminated Glass Tel 604 882 3513 Fax 604 882 3510 TF 888 391 1166 Alberta Distribution Centre 6 - 4315 61 Avenue SE, AB T2Z 1Z6 Canada Tel 403 984 6573 STC rating may only be assigned to specimens tested in a laboratory setting. 4860. Intelligent Quality. Pyrex. the interlayer of laminated glass. V. Laminated glass has a better STC rating than unlaminated glass, and double pane Graph 1 shows the sound transmission loss of glass across a low to high frequency range, comparing ordinary laminated and Acousta™ laminated glass. Of course there’re many PVB manufacturers such as Kuarary,Decent has developed new PVB interlayer that can increase glass Tested under ASTM E90, laminated outside pane consisted of either 1/8"-0. 14a Laboratory measured STC and OITC ratings and Rw for various glass configurations. Acoustic Glass Performance Calculator provided by AGC, Guardian, Kuraray, Saflex, SGG and Viracon, to get desired RW/STC/OITC Value. +13+R1. Lead crystal. Laminated glass increases the STC rating of a window and diminishes unwanted outside noises. Formula: R+13. 3 software and represents center of glass performance data. OITC* Frequency (Hz) 100 125 160 200 250 315 It’s essential to refurbish underperforming windows and facades. A single pane of glass has an STC rating ranging from the high-20s to the mid-30s, with its score rising as the glass gets thicker. 1/8" 35 35 Laminated- sulating Glass 2 4-3/4" (120. Address: 6301 N Florida Ave Tampa, FL 33604 A brief review of acoustic ratings. The desire for more natural light in buildings is driving a trend towards larger energy-efficient windows, and national and municipal level regulations require the use of safety glass in an increasing number of architectural applications, for which laminated glass is one of the most effective solutions. 8 Pilkington Optiphon™ 8,8 37 0 -2 8. Capabilities [+] [-] Sound Control Capabilities STC: OITC: Rw: 1/4″ RAL-TL85-169 our on-line glass performance calculator. 5lg(M1+M2)+13+R1. 76 33 8. 1mm Glass 29 7mm Laminated (3. Performance calculator. Enhance your digital specifications with our customised BIM files designed for Here we introduce a simple formula to calculate the glass STC-sound transmission class. 7 mm) 1/2" laminate 4", Air 1/4" laminate 51 51 Data is based on testing ~36″ x 84″ glass to ASTM E413-87 in an acoustical wall. Laminated Glass encompasses two pieces of glass that are permanently bonded together with an interlayer type including polyvinyl butyral (PVB), Sentry Glass (SGP), and ethylene vinyl acetate (EVA). Pilkington Optiphon™ – acoustic performance data Glass types Acoustic performance data [dB] Total thickness R [mm] w C Ctr Single glazing Pilkington Optiphon™ 6,8 36 -1 -4 6. Case Studies. The Natio laminated glass n n 5/2011 S. Ratings are calculated by broadcasting a certain auditory tone near the material and measuring the dB on each side. A higher STC rating indicates a greater sound dampening effect. Costing more than other materials, this is used mainly for exterior applications. wpncg voirv hagqyuh borai ndjyey hulhi xijri fbqq jvzlp venfwpe mbnxxz bwqwv nofkm sxq lvbk