Glass stc rating calculator free 030" PVB / ¼" Glass Laminate: 38: 34: Keep in mind that the STC and OITC rating numbers equate to how many decibels of noise are reduced by the glazings and that’s why a higher number is better. 29W b D3s trcQ C6 MKETIG@ Both achieve an STC rating of 40, but higher ratings require a combination. File type(s): Glass size and glazing system will affect STC rating. All performance data is determined using LBL Here we introduce a simple formula to calculate the glass STC-sound transmission class. 3 5/8" metal studs, 5/8" gyp (2 layers total), Batt insulation. Symbol Name Unit; STC: 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 1/4" (7. STC Rating Calculator. Higher numbers in both are better. With SF6 gas, it is recommended to use a mixture of this gas with air or argon with 25% SF6 and 75% air or argon. It roughly measures the reduction in decibels to noise thanks to the material added. ] SVC Rw summer TL 85-198 TL 85-170 - - TL 85-234 TL 85-229 TL 85-225 - - TL 85-228 - - TL 85-230 The STC value for a monolithic 6mm glass is 31, for an insulated 24mm glass is 35 and for a 13. And, as our population continues to grow, the spaces we inhabit are only getting noisier. This document provides sound transmission class (STC) ratings for various glass and wall constructions. Sound transmission class for common building materials # Material: STC [dB] Single pane glass window (dual pane glass window range is 26-32″) 27: Single layer of 1/2″ drywall, glued to 6″ lightweight concrete block Glass Options; Doors; Career; Support. 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. Both STC and OITC ratings inform your window or door selection based on sound insulation STC Ratings of Common Glass Assemblies Similar to wall assemblies, STC ratings for windows are determined in laboratory tests. back to top 2. Windows. -1/4″ For monolithic, laminated or insulating glass unit performance data, please go to SystemSelect ™, our on-line glass performance calculator. V. 8 operated by Lawrence Berkeley National Laboratory (LBNL) using International Glazing Database (IGDB) v102. Higher numbers indicate the assembly is more effective at reducing sound transmission. 1/8" 35 35 3/8" (9. 1/8" 37 37 1/2" (12. What Is a Good STC Rating for Windows? As an example, STC rating of 22 to 24 with gaining two points, shows a 90% reduction in noise. Address: 6301 N Florida Ave Tampa, FL 33604 Request Free Estimate; Understanding STC Ratings Whether you live or work in a bustling city or suburban area, noise is a constant. Welcome to our interactive glass selector tool where you can find glass that meets your performance requirements. As a result, it is not recommended for glass selection of exterior wall applications since the single-number rating Phone: 888-815-9691. A reference contour is fit to the 1/3 octave-band Sound Transmission Loss (STL or TL) values with a maximum of 32 deficiencies overall or 8 in any single 1/3 octave band. 11F P. Calculate the STC A large amount of glazing configurations means the perfect glass can be yours. For example, MLV has an STC rating of around 27. Laminated glass with an air pocket is often recommended for better soundproofing. We want to shout it from the Hoof Tops, we’re now officially a certified woman-owned small business! 1-866-949-9269. Laminated glass has a better STC rating than unlaminated glass, and double pane installations will provide the highest ratings. Become a Dealer . 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. Read more about the tools below, or register and start using Glass This online calculator is currently under heavy development. users have the option to refine these Glass Stc Rating Chart. Wall Assembly. 7843 or contact Each product is compared to a 2-pane window with clear glass. 43 - 44. † Based on Stats Canada Report CS44-004-IN, If the window has an STC rating of 30, the final STC with the addition of the blanket is not 65. 3 5/8" metal studs, 5/8" gyp (2 layers total), No insulation. or double-pane, the size of the gap between the panes, if gas is We use cookies to help you get the best possible experience of our site. 5” Acoustics Assembly Number: ISS-02 STC: 43 OITC: 28 Report No. Learn why STC ratings matter for soundproofing. Try now our easy-to-use, advanced software for glass and glazing system analysis. The two rating systems are not interchangeable. Source: STCratings. ¼ glass + ½ air + ¼ glass igu: For example, a standard The difference in sound levels is used to calculate the STC rating. The STC TR15 Acoustic Calculator . 1 mm) 1/4" 0. G. 9 mm) 1/4"0. The performance data below applies to triple insulating glass units constructed with three plies of glass, two airspaces and an interlayer (where applicable). A higher number is better. Right click on items and choose “save target as” to download a Calculating the STC Rating: The STC rating is calculated from a curve-fitting procedure defined by ASTM E413. Cross. Enhance your digital specifications with our customised BIM files designed for Glass size and glazing system will affect STC rating. Home / Blog / Demystifying STC Ratings (STC-35, STC-45, STC-52) Demystifying STC Ratings (STC-35, STC-45, STC-52) When clients come to us looking for soundproof control rooms, operator cabins and Insulation will noticeably improve the STC rating of an assembly. Ratings are calculated by broadcasting a certain auditory tone near the material and measuring the dB on each side. Using large, dramatic panels of glass is one of today’s most popular design trends. One of the features of glass is sound proof,whether it’s single glazing, laminated glass,insulated glass or even laminated The STC rating for glass is particularly important in applications such as recording studios, concert halls, conference rooms, and healthcare facilities, where maintaining a quiet and acoustically controlled environment is essential. Email: info@commercial-acoustics. Address: 6301 N Florida Ave Tampa, FL 33604 • All values shown are glass only. It is a logarithmic scale and ranges from 18 to 50 for windows. STC is not a direct measure of how many decibels of sound a wall can stop. 060 P. Matched to Your Specific Needs. Thickness STC* OITC* Double Std I. Explore the STC rating chart for walls, glass, windows, doors, and materials. Using both will give you a more complete picture of the product you are planning to install. STC ratings are used for windows doors, walls & most building materials. STC ratings are calculated by a weighted average of Transmission Loss (TL: a door’s ability to reduce noise) values taken over 16 frequencies, which are fitted to a curve in a method defined by the ASTM E413 Classification Standard for Rating *70% recycled content is based on the average recycled glass content in all Owens Corning fiberglass batts, rolls and unbonded loosefill insulation manufactured in Canada. They have to be used together. * * [The data and information set forth are based on samples tested and are not guaranteed for all samples or applications. Search for suitable solutions based on glazing parameters and acoustic requirements. Rw is predominately used in international (ISO) and European standards. The average STC rating for a regular single-pane window is 27, while double-glazed windows have an average rating of 29. Thermal Comfort Calculator This feature examines the thermal comfort of occupants during winter nights and summer days, taking into account responsive factors such as Data is based on testing ~36″ x 84″ glass to ASTM E413-87 in an acoustical wall. Seals and Gasketing: Even the highest-rated door will perform poorly without effective seals. Pocket Doors. SF6 the overall STC rating of the glass can be improved by as much as 3 points. 1/4" 38 38 1/2" (12. Estimated STC Rating. However, soundproof windows can have an STC rating of 48-54 or higher, providing Glass Product Type and Thickness STC Rating OITC Rating; ¼" Monolithic Glass: 31: 29: ½" Monolithic Glass: 36: 33: ¼" Glass + ½" Air + ¼" Glass IGU: 35: 28: ¼" Glass / 0. 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. Use the calculator to model the thermal and optical properties for your glass substrates, coatings and interlayers. However, depending on the goals for acoustical attenuation, it may be benefi cial to test the window assembly to determine the specifi c STC rating for the end use application. *OITC is estimated based on this test. † Based on Stats Canada Report CS44-004-IN, April 2013 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. A brief review of acoustic ratings. Our Facility; Our Culture; Leadership/Team; Testimonials; This article will explore the six variables that affect STC ratings in walls. This thermal and optical performance data simulation tool utilizes the industry accepted software, Window7. These ratings, however best fits the data gives the STC rating. Composition I. Products. Understanding STC ratings for drywall can be complex. pdf), Text File (. 1-866-949-9269. You CAN try to use it. Glass Kits: If your door includes glass panels, the type and thickness of the glass will affect the STC rating. Skip to Main Content Skip to Footer Quotes / Orders / Service: 800-325-0596. Beyond the type of windows you select, other factors can affect the STC rating of your glass. Factors Affecting the STC Level on Site. Guardian Glass has developed easy-to-use, advanced software for glass and glazing system analysis. For reference, standard house walls are 33 STC, while studio-level soundproofing requires a rating of at least 45. The insulating glass units are constructed with two plies of glass and an airspace. 38 - 40. This licence granted hereunder is Learn how to determine the STC rating of a wall. 53 mm) 1/4" 0. However, STC ratings can be misleading as they only begin at 125Hz, but we can hear deep sounds from as low as 20Hz. † Based on Stats Canada Report CS44-004-IN, April 2013 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. The STC (Sound Transmission Class) rating is a single-number rating system for interior building partitions and viewing windows used to categorize acoustic performance. What Is a Good STC Rating? An excellent rating is an STC of 60 or higher. If we assume that a branch of the United States Government, The University of Minnesota, The Minnesota Housing Authority, prominent acoustical engineers and several manufacturers of acoustical products are correct, a change of “1 STC” is equivalent to a change in loudness of . The triple insulating glass units are constructed with three plies of glass, two airspaces and an interlayer (where applicable). STC 43 Assembly Components Finish material 5/8” Gypsum Size 3 5/8” Steel Stud Spacing 16” oc Product AFB Thickness 3. You CAN even get the proper results. Wall 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. 52mm laminated glass is 39. A higher STC value indicates better insulation. B. It lists the construction details and thickness of single laminated glass, laminated insulating glass, airspaced glass, monolithic glass, and various wall constructions. The STC (Sound Transmission Class) rating is a single-number rating system for interior building partitions and viewing windows used to This AIS Glass’ software helps you to calculate the acoustic insulation & configurations like glass thickness, thermal breakage, etc. Some companies specialize in manufacturing acoustic windows which make use of multiple lites, often laminated and separated by an airspace in window frames that are split between the lites to create isolation similar to that of an “airspace” The General Glass Company resources page contains links to many helpful documents available for download in PDF format including warranties, guidelines and glass performance values. 2 L aminated Glass is a multifunctional glazing material that can be used in a variety of applications. 1/8" 36 36 3/8" (10. VX1 PD Sliding This calculator provides the calculation of sound transmission class (STC) rating for a double-partition wall system. Based upon the data and methodologies compiled in American Wood Council’s Technical Report No. Login ; Cart 0 Items View Cart. com. Assemblies will be organized by STC value ranging from an STC of 40 to an STC of 57. Sound Transmission Loss (dB) 43 1-3/8" STC Ratings for Windows and Glass. provided by a particular glass type. Sound transmission class (STC) and Impact insulation class results are given as well as the following detail data at ⅓ octave band Guardian Glass is a leader in tools for the glass industry. It’s important to STC ratings are an established way to average how much sound is stopped by something. HSW60 is an acoustic stacking glass door tested and rated up to unit STC 43. Laminated Glass STC ratings first popped up in the 1960s, as more and more people were looking to reduce sound transmission as much as possible between rooms at home, businesses, and more. 438. 060 Typical dual glazed windows can achieve better ratings of 25-27. OITC* Frequency (Hz) 100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500. Because they are most often equal, STC and Rw can usually be used interchangeably, although most of the discussions and examples in the guide cite only The higher the STC or OITC rating means the higher the sound attenuation properties of the window. Read more about the tools below, or register and start using Glass STC ratings allow to accurately compare noise reduction capabilities by using a single value for the acoustical performance of a door. You would have to do more serious calculations to find the right answer, or test the blanket + window assembly, but essentially you just need to know these two things: The STC rating of a soundproofing product is the rating of the product alone. The numbered contours are computers and electronic calculators were still rare objects, hard to get by. Menu. NWTL140828-03 STC 40 Assembly Components Finish material 1/ stc_rating_chart. Learn more. It must be remembered that the STC or OITC rating of a glass product does not represent the rating of the glazing system. laminated glass n n 5/2011 S. Glass Precast walls will usually come with an STC rating to save you the trouble of how determining the STC rating of a wall yourself. Factors That Affect Your Glass STC Rating. How to Calculate the Glass STC - Free download as PDF File (. Use The Calculator To Model The Thermal And Optical Properties. The Sound Transmission Loss (STL) is the amount of sound energy that is lost as sound passes through a partition. They are ideal for spaces prioritizing natural light transmission and aesthetic appeal. User's acceptance of the terms and conditions of this Agreement, the NRC grants to the User, and the User accepts, a free, non-exclusive, and limited licence to use the Software. VLT (%): U Value: SHGC: Selectivity: Glass Type: Clear filters. Printable Templates. OITC, on the other hand, covers a broader frequency range (80 to 4000 Hz), including lower frequencies often associated with external noise. In this case select a value which is 3-4 Rw points above required total window value for a closer approximation of total window value. Staggered or double stud walls are higher rated than single stud walls. Explanation. STC ratings are predominantly used in the United States. How is the STC rating calculated? A: The STC rating is calculated using a formula that takes into account the sound transmission loss (STL) of the wall or partition, as well as its coincidence frequency. 03 lamInateD aCOustICal Data Frequency (Hz) Laminated Glass Construction STC OITC 100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 sound Free Consultation Download eBook. 24 mm) 1/8" 0. Glass size and glazing system will affect STC rating. 030" PVB, 3/16" glass 48 50; 49 2-3/4" overall - 3/8" glass, 3/4" airspace, 5/16" glass, 3/4" airspace, 1/4" glass, . Cleaning Guidelines. Check with your framing system supplier for total window values. com Conclusion: A person cannot detect a change in loudness of +/- 1 dB (STC). Deficiencies are points where the actual TL values are lower than the reference contour. Thinner glass has a low STC rating because sound travels through it easily. Care & Maintenance; Windows 101; AMSCO Windows Blog; Parts Store; Warranty & Services; Pros; About Us. 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. 1. The STC (Sound Transmission Class) rating is a single-number rating system for interior building partitions and viewing Made of glass and wood or metal, French doors have varying STC ratings depending on glass thickness and door frame construction. 4000; STC. When planning glass wall systems, here’s a A leader in tools for the glass industry. Glass size and glazing system will. TD-136 - Recycled Glass Use An explanation of Vitro Glass's use of recycled glass. To achieve even higher STC Ratings, window manufacturers may offer the addition of laminated glass, dissimilar glass and other sound dampening components to their components. The higher the STC rating, the more sound will be dampened. Contact Us; Find a dealer . Contact; 1-866-949-9269. Studio Series; Artisan Series; STC Search find STC ratings by product and type. In addition, proper installation is critical to ensure that sound does not enter Gaps or weaknesses in the frame can compromise the STC rating. Variables. 9 mm) 1/4" 0. Outside-Inside Transmission Class (OITC)—measures sound transmission of low- to mid-frequency noises through exterior STC Ratings Chart Acoustical Performance of Glass and Wall Constructions Overall Thickness Inside Construction Space Outside STC Value ISO RW 3 1/4" (7. STC Ratings | Commercial Glass Manufacturing News and Information from Dillmeier Glass Company. Understanding STC Ratings for Drywall. of acoustic glass with high ratings. Cardinal Glass Performance & Comparison. 1/4"La 38 38 1/2" (12. If you’re shopping for sound-resistant products, understanding how ratings are calculated for STC rated doors, windows and other The Sound Transmission Class (STC) is a whole-number rating of how soundproof a door or window is. Data is based on testing ~36" x 84" glass to ASTM E413-87 in an acoustical wall. Window Glass: Normal STC Range: Typical Value: Single pane glass: 26-28: 27: Dual pane glass: 26-32: 26: Soundproof Window over a single pane window: 48-54: 48: Give us a call at 1. For instance, if you have an STC of 40 on one wall and decide to add another wall with an STC of 20, the STC of both walls combined will not be 60. The order of sound insulation performance from poor to excellent is: monolithic glass < laminated glass <double insulated glass < triple insulating glass< ion STC Welcome to the world of Sound Transmission Class (STC) calculators, where we transform the daunting task of soundproofing into a science—and a bit of fun! Whether you’re a homeowner looking to block out your noisy neighbors, a builder ensuring your walls are up to snuff, or simply a curious soul eager to understand how sound travels, this guide is for you. Its original intent was to quantify interior building partitions, not exterior wall components. Glazing type (single)-1st pane (Float/LamiGlass PVB)-Thickness (Desired Thickness)-Apply-Report (Download PDF) Final file including Rw, OITC, STC, and DB value under different sound Frequencies. This provided a uniform way to compare different types of materials as easy as possible. You can’t add STC ratings together. Acoustic Panels; Acoustic Fabrics; Schedule a Free Consultation; Decoding STC Ratings: What They Mean and Why They *70% recycled content is based on the average recycled glass content in all Owens Corning fiberglass batts, rolls and unbonded loosefill insulation manufactured in Canada. The tables below include a selection of the most common colors available. CAC OITC ratings are generally lower than STC ratings because the results are in decibels rather than the STC point system. Below table list some examples of STC levels. 5 mm) 1/4" 0. By clicking 'Accept' you agree to our use of cookies. 030 P. STC ratings are used for windows, doors, walls and most building materials. Address: 6301 N Florida Ave Tampa, FL 33604 Phone: 888-815-9691. • As a guide when frames are included, the Rw values shown will decline. STC Ratings . Accept STC: OITC: Rw: 1/4″ Lam. Search. 060" PVB, 1/4" glass 57; 61 65; 3150. STC is another critical metric that quantifies how well a wall or other vertical partition blocks sound. The attached STC and OITC data is for glass only and that the final STC rating of the window assembly could vary because of the influence of the acoustical performance of the framing members and the construction of the window assembly. No products in the cart. It’s important also to consider: Glass thickness: thicker glass typically provides better sound insulation than does thinner glass To find out the best windows and their glass STC rating chart, contact the best window company in Toronto such as Vinyl Light. The STC ratings for windows and glass can range from 18 to 65, depending on the type and thickness of the glass. It may or it may NOT work correctly. 14a Laboratory measured STC and OITC ratings and Rw for various glass configurations. 02. Request for Quote. with single laminated glass Laminated: 3mm - 0. STC ratings are most reliable for everyday sounds, like speech and common household noises (500 to 2,000 Hz), but less STC is a widely recognized measure for sound insulation in windows and doors, focusing on human speech frequencies. Determine the transmission loss: Subtract the second measurement from GLASS TYPE What Are STC Ratings?Sound transmission class (STC) labels to specify how partitions and walls block sound and reduce noise. 800-782-5742 Talk to an expert! MAIN MENU MAIN MENU. It is measured in decibels (dB) and is calculated using the following formula: STL = STC - 10 log10(f / 1000), where f is the frequency of the sound in Hz. With this in mind, a score in the mid -30s might seem low, but it’s fine for the majority of office spaces. On the STC. That made loga-rithmic calculations, on which most acoustic calculations are laminated glass 5/2011 S. Measure the sound in the neighboring room: Next, proceed to the adjacent room and note the number of transferred decibels. . About Us. In these settings, glass with high STC ratings is used to create soundproof partitions or windows to minimize sound transmission between Glass Performance Calculator . (STC), Outside Inside Transmission Class (OITC), and Reduction Index (Rw). If a wall has a rating of 35, it does not mean that the wall stops 35dB of sound. Search for Sound Transmission Class (STC), a ratings by series Technical Glass Guide Update 6/15/21 – Version 3. All contours are defined across the one-third octave band range 125 Hz to 4000 Hz, inclusive, and are numbered according to their value at the 500 Hz band. What is an STC rating? Sound Transmission Class (STC) ratings show how well a wall assembly diminishes airborne sound traveling from one room to another. Sound Transmission Class (STC) Calculator Sound Transmission Class (STC) Calculator Select Wall Type: Wood Stud WallConcrete Block WallBrick WallDrywall Partition Wall Thickness (inches): Calculate STC Rating Glass Options; Doors; Career; Support. Products; Technical The higher the STC rating, the better the sound insulation. Specifying Your Sound Preferences. Studio Series; Artisan Series; Serenity Series; STC Rating (Text size: large - style 1 no background) Artisan Series STC Ratings. Laminated Glass Applications Resch A four-point STC improvement can cause a clearly perceptible change in your home’s acoustics, while a 10-point improvement can reduce sound by 50 percent. Properly *70% recycled content is based on the average recycled glass content in all Owens Corning fiberglass batts, rolls and unbonded loosefill insulation manufactured in Canada. 15 (TR15), this calculator simplifies the calculation of sound transmission through wood-frame floor and ceilings. At this rating, you may be able to hear very loud sounds faintly, but most sounds you won’t hear at all. It’s like the cousin of CAC but focuses on walls instead of ceilings. ,LTD YourturnkeyChinatemperedglass/laminatedglass/insulatedglasssupplier Add: Rom A3 04,S he ngx ifu ad N O. Saint-Gobain products directly in Phone: 888-815-9691. Consult This online calculator is currently under heavy development. Sound Transmission Class ratings. This rating is based on how much sound is blocked across a range of frequencies, usually from 125 Hz to 4,000 Hz. Description. This rating will give you an idea of how effective your chosen materials or construction rd from outdoor to indoor. Although it is commonly used in the United States and is the most widely used measurement of sound reduction, STC has various limitations that prevent it from being comprehensively reliable in determining actual soundproofing expectations. Search For more information on our products or further assistance with 1-7/8" overall - 1/4" glass, 1/2" airspace, 1/4" glass, 1/2" airspace, 3/16" glass, . 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. Glass Stc Rating Chart. 877. The monolithic glass is one lite of glass. We would like to show you a description here but the site won’t allow us. For Acoustical Guide – Determining Minimum STC Rating Figure 1. wdt_ID wdt_created_by wdt_created_at wdt_last_edited_by wdt_last_edited_at Product Description QINGDAOMORNBUILDINGMATERIALSCO. STC is generally used in settings where you have full-height walls that extend from floor to ceiling. 0 This guide provides an introductory overview of glass concepts and terminology, plus Glass size and glazing system will affect STC rating. Guidelines. The performance calculator simplifies the creation of glass make-ups through a point-and-click, web-based interface. Vitro Performance Calculator. ) based on its ability to reduce sound coming through it. The As discussed in Section 2, STC ratings and the Rw for most glass configurations are equal. Acoustic Treatment. For full details of the decorative interlayers including Vanceva ® Color, Pattern, Metallic and Image see the decorative section. 030 pvb Will help you determine whether you need to heat treat or temper different kinds of glass under different conditions. See more It’s essential to refurbish underperforming windows and facades. TD-138 - Heat Treated Glass for Architectural Glazing STC rating can be determined by employing the following STC calculation formula: Use an audiometer to record the decibel levels in the room containing the noise source. Our glazed partitioning systems are tested at a certified laboratory to ensure reliable STC ratings. Glass product type and thickness stc rating oitc rating; Stc ratings chart acoustical performance of glass and wall constructions over. Sound transmission class for common building materials # Material: STC [dB] Single pane glass window (dual pane glass window range is 26-32″) 27: Single layer of 1/2″ drywall, glued to 6″ lightweight concrete block STC rating (Sound Transmission Class rating) is a score given to a building’s surface (wall, ceiling, window, etc. Glass Analytics online tools offer a comprehensive suite of engineering and analytical reports that demonstrate the advantages of high-performance glass in building facades. Of course there’re many PVB manufacturers such as Kuarary,Decent has developed new PVB interlayer that can increase glass [ ] Calculate the STC Rating: Let the calculator process the data and compute the STC rating. The system includes many materials other than glass, including the framing, the glazing gaskets/sealants, insulating glass unit spacer and sealants, and possibly interlayers. • The higher the Rw value the better the acoustic performance. pdf - Free download as PDF File (. To get started, input your required performance data below. A leader in tools for the glass industry. txt) or read online for free. The sound attenuation properties of a glazing type will be achieved with the plastic interlayer absorption of sound transmission of a laminated glass or else with the isolating air space of an I. 1 / 7 2 / 7 3 / 7 4 / 7 5 / 7 6 / 7 7 / 7 STC Ratings | Commercial Glass Manufacturing News and Information from Dillmeier Glass Company. 1/4" 39 39 5/8" free quote. 2 glass of 3 mm 19 mm [¾''] 29 24 I. FLOAT GLASS The STC rating of a single 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.