Best stc rating glass chart. 3 software and represents center of glass performance data.

Best stc rating glass chart S. Therma-Tru STC-rated Noise Reduction doors deliver aesthetics with a commercial level of performance for residential projects. -1/4" (total 1/2" thick), 1/4"-0. greenfiber. Here’s a quick guide to interpreting STC ratings: STC 25-30: Speech can be easily understood through the partition. Tested under ASTM E90, laminated outside pane consisted of either 1/8"-0. Jun 15, 2024 · STC Ratings for Windows and Glass. At this rating, you may be able to hear very loud sounds faintly, but most sounds you won’t hear at all. Adding in more air space also means the sound waves have more space to move through as dissipate as they go. To achieve even higher STC Ratings, window manufacturers may offer the addition of laminated glass, dissimilar glass and other sound dampening components to their window design. The performance data below applies to an insulating unit constructed with two plies of glass and an air or argon filled space. Here is a useful outline of STC rating levels, types, requirements, and suitable strategies and applications to help you choose the perfect match. Lower Range Up to STC 35. STC Rating Chart. So the windows are 2-pane. A higher sound transmission class rating indicates more effective sound insulation than a lower number. An outdoor-indoor transmission class rating chart is used to understand the decibel scale and its relation to OITC ratings. Technical Glass Guide Update 6/15/21 – Version 3. Estimated. Mid Range STC 36 - 42. If sound reduction is a priority, look for a window in the 30-35 STC range. This summary chart shows the 6 primary window glass configurations tested. Consider not only the STC rating but also door quality and construction. Factors that affect glass STC. If you have an STC 33 wall and decide to add another sheet of drywall with an STC of 20 you do not get a finished wall with an STC of 53. An STC rating measures how much noise is stopped by something. com 5500 77 Center Dr. Even if all other aspects of the door are set up properly, the intended sound reduction will not occur. Seals and Gasketing: Even the highest-rated door will perform poorly without effective Heavier glass and/or different glass thicknesses can be used in lieu of standard glass for a higher reduction of sound. An STC rating is an instrument measurement of how much noise is stopped. STC sound rating was introduced in 1961 as the method of comparing various wall, ceiling, floor, door and window assemblies. If thicker glass material is used, the rating can go up to 35. Double-Glazed Acoustical Performance of Glass and Wall Constructions Overall Thickness Inside Construction Space Outside STC Value ISO RW 3 1/4" (7. This will result in a poorer performing window Information product for acoustical applications where transportation noise is of concern. Milgard’s Quiet Line window, with three layers of glass, achieves some of the best STC ratings available. Products versus Spaces Phone: 888-815-9691. The best way to deal with impact noise is to cushion the actual blow or impact. Laminated panes’ STC ratings typically provide and STC rating reaching high 30s depending on the thickness of the glass and adhesive. Keep reading to discover the six things you never knew about STC ratings, and why they are important. Understanding STC components. For windows, STC ratings range from 18 to 38. -114• glass) with an STC rating of 34. The higher the STC rating, the more sound will be dampened. Each configuration was tested by itself and then with the added Soundproof Window at 4 different air spaces (glass to glass measurements) shown to the right. What Is a Good STC Rating? An excellent rating is an STC of 60 or higher. With either scale (the OITC scale for exterior glazing or the STC scale for interior glazing) a performance rating of 30, for instance, RAL TL 85 and TL 95 sound transmission loss tests are in accordance with ASTM E90. 0024 greenfiber. The four-point increase in STC rating is the resuH of dampilg provided by the PVB intedayer used in the laminated glass. Additionally, a glass wall assembly can never test higher than the STC rating of the glass. When using laminated glass, you can increase the glass thickness or use different glass thicknesses for individual glass lites. Nov 25, 2022 · 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. Here’s a quick guide to understanding STC grading. NWTL140828-03 STC 40 Assembly Components Finish material 1/ STC Rating STC Rating Static Door Operable Door Perimeter Seals Door Bottom Threshold Panel w/ Gasketing 30 30 103N, 107N, 120N, 122N 420N 897NS 127N, 133N, 134N, 137N 137S, 303N, 700N, 700S 30 30 130S 225S 896S Mar 22, 2022 · Six Things You Never Knew About STC Ratings. Sound Transmission Class (STC) Ratings. The STC rating goes all the way up to 65. Door Material In order to choose the best product, it is important to first determine what the optimum level of acoustical buffering is required for your space. A leader in tools for the glass industry. You might get something around STC 35. Mass pigmented and decorative interlayers can also be used to provide a wide range of effects. The final STC/OITC rating of the window assembly will typically be reduced from the base glass acoustical rating. 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. Laminating glass is a popular way to increase an STC rating. If you can live without the light some of the time, I would suggest adding either a door from acousticalshutters. Sound Transmission Class Sound Transmission Class (STC) is a single-number rating system that assigns a value to a product to indicate how well that product insulates against unwanted STC ratings are used for windows, doors, walls and most building materials. STC 30 = This is where most dual-pane windows perform. Double-glazed glass can also achieve an STC rating of up to 40. STC 35-45: Loud speech is audible but less intelligible. There are different ways to improve the STC rating of windows. This might seem a little difficult to do, but as long as a person has somewhat of an idea on how the ratings work, it is a May 30, 2024 · STC is a widely recognized measure for sound insulation in windows and doors, focusing on human speech frequencies. No frames are utilized in the testing to ensure accurate comparison of the glass configuration can be made without external Escape the noise with PGT's impact windows and doors. 3mm thick monolithic glass, glass STC is only 30Dbs,when glass thickness was increased to 12mm thick,glass STC can reach 36Dbs,whether it’s single piece monolithic glass,laminated glass,or insulated glass,the thicker total glass thickness,the better sound transmission loss. High Range STC 43 - 45. Assemblies will be organized by STC value ranging from an STC of 40 to an STC of 57. com www. They are logarithmic values and cannot simply be added. In addition, proper installation is critical to ensure that sound does not enter through poorly fitted components. Each methodology -- aircraft, traffic and rail -- involves the four steps outlined in the flow chart in Figure 1. -1/8" (total 1/4" thick), 1/4"-0. OITC* Frequency (Hz) 100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 1/8" glass, . Understanding STC ratings for drywall can be complex. Glass size and glazing system will affect STC rating. 70 60 --STC38 Acoustical Guide – Determining Minimum STC Rating Methods for Determining Required Window STC Rating The three methodologies discussed below for determining the minimum required STC of windows are identical in format. It includes STC ratings for commonly used materials such as: It should be noted that STC ratings obtained in a lab may be different than those achieved in real-world applications. Outdoor-Indoor Transmission Class (OITC) Recently, a new single-number rating has Dec 7, 2023 · Through acoustic testing, you’ve determined an assembly has an STC rating of 50. 501 re 306 396. Our expertly crafted solutions provide unbeatable protection against noise pollution, while preserving natural light and design flexibility. 03. Sound Transmission Class ratings. It made the windows heavier—was fun hefting them up to install them. com. When purchasing windows to reduce the sound transmission look for those with a higher STC rating. Lab results are highly controlled and may not reflect the same performance in the field based on the conditions of your environment. Save as PDF 800 Park Drive , Owatonna , MN 55060 US | (800) 533-2080 Class (STC) rating. Caution: You cannot add STC ratings. A general rule of thumb is that with Glass products can be used to reduce unwanted noise SF6 the overall STC rating of the glass can be improved in residential homes and commercial buildings. 030 P. Glass siz e and glazing system will a˜ect STC rating. 228. For simplification, we have segmented NanaWall sound-rated opening glass wall solutions into three categories. Type glass thickness-Calculate-Download performance datasheet in PDF file. Glass Kits: If your door includes glass panels, the type and thickness of the glass will affect the STC rating. What is STC rating? Some transmission class is an integer rating that determines how well a product can reduce airborne sounds. At JELD-WEN, for example, we Jan 28, 2025 · However, it is important to note that different glass options, as well as the use of combination units, may affect the sound abatement performance of the unit. We opted for the outside pane to be 1/4-inch glass (1/8th inch is standard). SoundPro calculates glass usage by performance or glazing configuration. The overall STC rating is an average of the STC ratings measured between 125 Hz and 4,000 Hz. E413-87 in an acoustica l wall. OA Glass 1 Glass 2 Acoustical Ratings - Ultra I C650 updated 04. 030" P. STC Results Chart. Laminated and Double-Glaze Glass Combinations: Combining laminated and double-glazed glass is best for ideal soundproofing. This rating is given to materials that are tested over a range of frequencies, and are proven to block sound in some capacity. Mar 30, 2023 · Also, an acceptable STC rating for walls may be different from the acceptable STC rating for floors, depending on whether the walls are shared by a neighbor, or a room is directly beneath a kitchen with heavy traffic. When tested in the field, an STC rating of a wall assembly will almost always be lower than the lab The order of sound insulation performance from poor to excellent is: monolithic glass < laminated glass How to calculate the glass STC? One of the features of glass is sound proof,whether it's single glazing, laminated glass,insulated glass or even laminated ins The STC (Sound Transmission Class) is a rating system for interior building partitions and viewing windows used to Triple Insulating Glass Construction STC OITC Sep 23, 2008 · The security glass package includes a 1/8-inch exterior pane of glass and a 1/4-inch interior pane of laminated glass, providing an STC value of 35, the maker says. That being said, anything below an STC rating of 40 might garner comments about paper thin walls. Is Complete Soundproofing Possible? Our STC rating chart above only goes to 50 because STC rated windows are in that range. The STC rating system looks at the amount of noise mitigation provided by the assembly over a broad range of frequencies and a single number is calculated as its rating. 1. *OITC is estimated based on this test. Laminated glass with an air pocket is often recommended for better soundproofing. B. Down to 35 – 40. Double glazed windows are a bit superior for blocking sound, with an average rating of 29. If you have an STC 45 wall, this does not mean the wall stops 45 dB of sound. Of course, the higher the STC rating, the better. Costing more than other materials, this is used mainly for exterior applications. 24 Page 1 of 7 Glass 3 Spacer STC OITC Test Date Test Number Operating Style Series Numbers As the table shows, a single pane 1/4” annealed curtain wall window has a STC rating of only 31 and an OITC rating of 28. ) versus the other side of a building’s surface. 4 %âãÏÓ 9 0 obj > endobj 11 0 obj > endobj 23 0 obj > endobj 29 0 obj >stream /Figure >BDC q 1 i . Dec 22, 2022 · Several factors in determining the best type of glass for your project include insulation requirements, intended usage, acoustics, and other conditions. In the US, it is widely used to rate interior partitions, ceilings, floors, doors, windows and exterior wall configurations. Lab Proven STC Ratings the STC value, the better a construction reduces the transmission of sound. STC OITC 80 100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 Mar 5, 2021 · STC stands for sound transmission classification. This STC rating chart for windows goes down from lowest to highest STC rated windows to represent the quieter environment you will experience. But what does that really mean? A sound transmission class chart is a simple way to understand the decibel scale and its relation to STC ratings. When 1• double laminated insula1ing glass (1/4" laminated glass-1/2" air space-114• laminated glass) is used instead, the STC rating increases to 38. The STC ratings allow accurate 'apple to apple' comparisons. Armorplast® and Riot Glass® ArmorPlast® is designed to resist penetration in UL752 Levels 1, 3 and 6. A higher sound transmission class rating indicates more effective sound insulation than a lower rating. Laminated architectural glass can be fabricated using various glass types, including low-e, clear, low-iron, tinted, reflective, patterned or wired glass to achieve desired aesthetics or to improve solar control and thermal performance. Explore noise reducing windows and doors from Pella. These ratings, however The following examples demonstrate improved STC values in floor/ceiling assemblies. AGC Glass Configurator Single & Laminated Glass Data. 7 mm) 1/2" laminate 4", Air 1/4" laminate 51 51 Jan 18, 2022 · STC Ratings Updated : 01/18/2022 by K. Factors That Affect Your Glass STC Rating STC. After a 1/4” Thermolite sound control window was placed behind the same window, the STC rating improved to 43 and the OITC rating improved to 33. An example of a window STC rating chart is as follows: 26-28 – single pane window; 26-32 – double pane window; 48-54 – soundproof window over a single pane window Feb 10, 2014 · Again, 1/8” which they call double strength, over a 3/16” double pane unit (insulated glass unit) with as wide of an airspace between panes (seal) as possible, typically 3/4” OA (“over-all”) or a 7/8” OA and you will have an incredible STC rating with this. Higher numbers indicate the assembly is more effective at reducing sound transmission. Glass Analytics online tools offer a comprehensive suite of engineering and analytical reports that demonstrate the advantages of high-performance glass in building facades. 22. Laminated & Double-Glazed Glass. Data is based on testing ~36" x 84" glass to ASTM E413-87 in an acoustical wall. 5” Acoustics Assembly Number: ISS-02 STC: 43 OITC: 28 Report No. Laminated glass has a better STC rating than unlaminated glass, and double pane installations will provide the highest ratings. There is plenty of information out there at our fingertips, but it's important to get a full picture. Dec 31, 2024 · Gaps or weaknesses in the frame can compromise the STC rating. See additional notes below data for specific . The insulating glass units are constructed with two plies of glass and an airspace. Address: 6301 N Florida Ave Tampa, FL 33604 Typical dual glazed windows can achieve better ratings of 25-27. Suite 100, Charlotte, NC 28217 PM-6. Increasing glass thickness is the most important measurement. But it really made a difference. Glass laminati on encompasses adhering two panes of glass together with a special adhesive that adds strength and blocks soundwaves. To determine the specifi c STC ratings of glass and a window or door assembly, the following ASTM standards should be used: • ASTM E 90 - 90 Standard Test Method for Jul 31, 2022 · Glass doors can range from 28 to 60+ STC ratings, while steel and fiberglass doors range from 20 to 50. Sound Transmission Class (or STC) is an integer rating of how well a building partition attenuates airborne sound. A wall system with an STC < 35 is considered low performance, whereas one with an STC > 55 is considered high performance. Pim Foam or Dura**** 3/32 3/32 - 28 23 4/19/99 TL99-145 Operating Style Series Numbers Glass 1 Glass 2 Spacer STC File Name STC 30 if you live in an average area but want more privacy, STC 35 is the go to in louder areas, STC 37 if in a louder area and you want a luxury feel or you are pretty close to the airport or overlooking the freeway, STC 40+ is either you live in an area that is obnoxiously loud (seldom the case for single family housing) or you don't want to Windows and doors can help block outside noises whether you live in the city or on a farm. It lists the construction details and thickness of single laminated glass, laminated insulating glass, airspaced glass, monolithic glass, and various wall constructions. 24 Page 1 of 2 Due to continual product research and development, details listed are subject to change at any time Falkbuilt glass doors and dynamic walls ratings vary depending on thickness of the glass. 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. Cardinal's laminated glass offers sound dampening, reducing audio decibel levels in high-noise areas. 3-08 Rev H 02/16 Superior Sound Control Sound transmission class (STC) ratings solve that problem by giving a single value to acoustical performance for a door. 3 software and represents center of glass performance data. *OITC is estimate d base d on this test. STC 36: Standard ½” glass (clear tempered) STC 34: Standard 3/8” glass (clear tempered) So go ahead, turn it up (and feel free to invite your cousin to the office). When planning glass wall systems, here’s a STC Rating Chart Determining STC Rating of Wall, Drywall, and Windows STC Rating of Drywall. A heavy carpet and high quality pad work best to improve the IIC value of a floor/ceiling. Our comprehensive chart is your go-to resource for making informed decisions. Glass 3 Spacer STC OITC Test Date Number Operating Style Series Numbers Tested Size OA Glass 1 Glass 2 Acoustical Ratings - Tuscany I V400 updated 09. 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. A typical dual-pane window has an STC rating of 25-30. 030" PVB, 1/8" glass, 1/2" airspace, 1/8" glass, . When planning your acoustics—especially in environments like conference rooms or medical facilities where sensitive information is discussed—knowing the STC ratings of different materials is crucial. Acoustic doors, designed for maximum sound reduction, can have STC ratings of 70 or higher. May 22, 2022 · And glass in the door lowers the overall STC rating even more. STC is the wall equivalent of CAC. OITC, on the other hand, covers a broader frequency range (80 to 4000 Hz), including lower frequencies often associated with external noise. A rating increase from 24 to 33 corresponds to a 95% of noise reduction. Transmission Class (STC) rating may be a more appropriate measure, as it describes the approximate decibel level reduction for the sound of human speech. -1/2" (total 3/4" thick), panels caulked in place in single frame with wooden stops and glazing putty. What is a good STC rating for May 22, 2022 · Commonly called acoustic laminated insulated glass, the windows provide an STC of 39 to 54 or greater. 0 This guide provides an introductory overview of glass concepts and terminology, plus By changing the thickness of the glass the sound waves will have to modify to move through the glass. The final STC/OITC rating of the window assembly could vary because of the influence of the framing members and the construction of the window assembly. Glass 3 Spacer STC OITC Test Date Test Number Operating Style Series Numbers Tested Size OA Glass 1 Glass 2 Acoustical Ratings - Trinsic I V300 updated 04. This range is suitable for offices or moderately noisy environments. Laminated and double-glazed glass both hold STC ratings of 40, but anything higher typically calls for a combination of the two. May 19, 2023 · This article will explore the six variables that affect STC ratings in walls. Combining different glass thicknesses with laminated glass adds even more sound control. All data presented is for glass-only testing. All performance data is calculated using LBNL Window 7. We carry STC Ratings anywhere from STC 26 all the way up to STC 70. How to Increase Window STC Rating. When using monolithic glass, increasing the glass thickness can help. 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. 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. Email: info@commercial-acoustics. May 14, 2021 · It is hard for us to know how much DB noise has been blocked during transmission. This rating is common in residential buildings with minimal soundproofing. Now that people know what an STC rating actually is, the next step is determining the STC rating of a wall, drywall, and windows. STCratings have been determined from TL data using ASTME413. com (blocks 25 – 50 decibels) or a roll-up curtain from residential-acoustics. Of course, the rating is determined as an average based on the different frequencies between 125 Hz to 4000 Hz. The STC and ISO RW values indicate the acoustical performance ratings, with higher numbers indicating better sound Jan 11, 2025 · The result is sound control over a greater range of frequencies and a significantly higher Sound Transmission Class (STC) rating than a window with standard dual-pane glass. 1/8" 35 35 than glass, including the framing, the glazing gaskets/sealants, insulating glass unit spacer and sealants, and possibly interlayers. 030" PVB Feb 19, 2024 · How is the STC Rating Determined? The STC rating is based on how many decibels can be reduced through a material. Our retrofit framing allows us to install the ArmorPlast® into your existing framing to significantly reduce costs and downtime. com (blocks 30 decibels) You should be able to get either for under Apr 4, 2019 · In this post, window replacement experts Renewal by Andersen® of Western New York discusses STC ratings and what rating is the best for windows. On the STC Ratings Chart Acoustical Performance of Glass and Wall Constructions Overall Glass 2 4-3/4" (120. While STC and OITC ratings are published for various glass configurations, accurate ratings for the STC Rating Chart For Windows. STC ratings are the ONLY way to accurately compare various noise reduction products. Riot Glass® is a full line of ballistic glass available in single and dual pane options. Both achieve an STC rating of 40, but higher ratings require a combination. -1/8" (total 3/8" thick), 1/4"-0. To determine the specific STC ratings of glass and a Jul 5, 2023 · Thinner glass has a low STC rating because sound travels through it easily. These May 6, 2020 · 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. 1. STC 43 Assembly Components Finish material 5/8” Gypsum Size 3 5/8” Steel Stud Spacing 16” oc Product AFB Thickness 3. 17. Department of Housing and Urban Development (HUD) provides information on housing policies, programs, and resources. Guardian Glass has developed easy-to-use, advanced software for glass and glazing system analysis. Understanding STC Ratings for Drywall. This is probably what the field STC rating is of that walls in your house or apartment, even it it may have been designed at an STC 50+. 751 614 -426. Determine the glazing system that has the best noise reduction properties. The STC rating has been in existence for many years and is based on speech sounds. 06 m W* n 0 792 612 Window STC Rating Chart. glass constructions only. The STC (Sound Transmission Class) rating is a single-num ber rating system for interio r build ing partitions and viewin g windows used to catego rize acoustic performanc e. Read more about the tools below Sound Transmission Class (STC) is a measure for rating the performance of a wall system as a barrier to airborne sound transmission between adjacent closed spaces such as offices. Oct 10, 2024 · STC RATING CHART: STC: What can be heard at this level: 25: Soft speech can heard and understood: 30: Normal speech can heard and understood: 35: Loud speech can heard and understood: 40: Loud speech can heard, but not understood: 45: The threshold at which privacy begins: 50: Loud sound can be heard, but are very faint: 60+ At this level, good Jun 16, 2023 · Laminated glass can have STC ratings of 40 or more. 50003 659. The STC (Sound Transmission Class) rating is a single-number rating system for interior building partitions and viewing The higher the STC or OITC rating means the higher the sound attenuation properties of the window. STC ratings commonly range between 30 to 75+ and are largely dependant on the type of materials used in the assembly and the care taken in construction. The U. Performance targets are selected based on acoustic ratings, and results are revealed immediately. 24 Page 1 of 7 This document provides sound transmission class (STC) ratings for various glass and wall constructions. 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. Glass thickness. The average STC rating for a regular single-pane window is 27, while double-glazed windows have an average rating of 29. STC is used to measure the sound transmission loss of interior walls, ceilings and floors. Determine Target STCs 800. V. PDF-1. Data is based on testing ~36″ x 84″ glass to ASTM E413-87 in an acoustical wall. Jan 10, 2025 · Precast walls will usually come with an STC rating to save you the trouble of how determining the STC rating of a wall yourself. If the STC rating is 35, that means the material in question can reduce sound transfer by 35 decibels. Mar 3, 2023 · To find out the best windows and their glass STC rating chart, contact the best window company in Toronto such as Vinyl Light. info@greenfiber. STC Rating. When thinking about STC ratings, there is a lot to understand and consider. It goes without being said, that having the proper STC rating on your STC Rated Doors make a major difference in the effectiveness. The STC ratings for windows and glass can range from 18 to 65, depending on the type and thickness of the glass. Oct 18, 2023 · How to Read an OITC Rating Chart. Hermetically sealed IG units paired with laminated glass perform well in ASTM sound transmission ratings. The STC (Sound Transmission Class) rating is a single-number rating system for interior building partitions and viewing windows used to categorize acoustic performance. A floating floor is another way to significantly improve an Feb 18, 2022 · STC Rating of Fiberglass vs Rockwool (Which one insulates the best) Note: Here I will be going over which type of insulation material works best when put inside a typical interior wall with ½” of drywall on either side, which has an STC rating of 34 on its own, and how it increases this rating. What Are STC Ratings? Jan 28, 2024 · The average STC rating for a regular single pane window is 27. Both STC and OITC ratings inform your window or door selection based on sound insulation performance of the window frame, the fi nal STC rating of the window assembly could have no infl uence to a 3-point drop in STC ratings from the base glass STC rating. fire-resistance ratings for veneer and conventional systems –Can minimize or eliminate irregularities such as ridging, boarding and nail pops associated with standard drywall Nov 7, 2016 · Looking at the chart above, once a wall gets to an STC of 45, loud speech is audible but not understandable. Rochester: 585-213-5066 Buffalo: 716-402-1640 –Veneer plaster partitions achieve up to 63 STC in steel-framed resilient systems and up to 52 STC in wood-framed resilient systems –Have achieved 1- to 4-hr. This is the main reason I went with Hamilton: it’s a thick enough frame for 1/4 glass. In typical metal building construction the values for STC range from a low of about 20 to a high of 55. Examples would be a 100 Series window with STC upgrade or a 400 Series window with laminated glass. Fortunately, there are some tools we can use when we choosing the suitable glass types we need. 24 mm) 1/8" 0. Thermolite Sound Transmission Loss Test Report Results What is STC? STC ratings measure sound level on one side of a building’s surface (wall, ceiling, window, etc. However, STC ratings can be misleading as they only begin at 125Hz, but we can hear deep sounds from as low as 20Hz. Glass size and glazing system will affect STC rating. Most of the time, an assembly’s OITC rating is lower than an STC rating. See Section 3 for actual TLdata. The package is available on all of the manufacturer's product lines, including the PlyGem Lifestyles vinyl window line (pictured with a wood-grain interior). The cost, however, may be prohibitive. STC Lab Test Results 1/8" single pane glass Tested at various air spacing between the test glass and a Soundproof Window 27 STC Test Glass - STC Test Result Range: 43 52 40 50 60 70 T ransmission Loss (Db) SOUNDPROOF WINDOWS®, Inc. STC is determined by a weighted average of TL values taken over 16 frequencies, which are fitted to a curve in a method defined by the ASTM E413 Classification Standard for Rating Sound Insulation. A typical STC rating chart will often include an example of materials with a given STC rating, and the sounds you can expect to hear given the STC rating. Click here to review the full details. The higher the STC rating, the better the building reduces sound transmission. The IIC rating is also noted. Sound performance for years has been measured two different ways, below is a quick synopsis of the two. nisj evbp gwkef waao cbld lkxet swgk ifhgzv uirl kxmi aoh eepx hxgt tvodi qbpjnzod