Wood glass stc rating chart. Down to 35 – 40.

Wood glass stc rating chart perform better, as shown in this data chart by the National Research Council of Canada. By doubling the drywall and adding some batt insulation, the STC rating is improved to 44. This is because STC ratings are *Sound Transmission Class (STC) measured in decibels is a rating system that measures how well a building material or partition blocks airborne sound. If wood particles are noticeable, the particles should be removed prior to application of paint or stain. B. STC ratings are pretty straightforward. Combining different glass thicknesses with laminated glass adds even more sound control. 4 Column Protection . It lists the construction details and thickness of single laminated glass, laminated insulating glass, airspaced glass, monolithic glass, and various wall constructions. The STC and ISO RW values indicate the acoustical performance ratings, with higher numbers indicating better sound If you have an STC 45 wall, this does not mean the wall stops 45 dB of sound. Mineral core wood doors and Honey comb core hollow metal doors with gasketing test to an STC rating of approximately 32 to 36. glass & wood stops Requires STC S105 metal lite kit. This rating was determined by Intertek/Warnock Hersey per ASTM E90-2002, with the doors being inoperable or sealed in place. STC door CharT 30 30 30 30 30 30 30 31 31 32 32 32 . ¼ glass + ½ air + ¼ glass igu: Phone: 888-815-9691. WARRANTY. Learn more. To determine the specific STC ratings of glass and a Feb 20, 2022 · STC ratings are also used for doors, walls and other building components. Heavier glass and/or different glass thicknesses can be used in lieu of standard glass for a higher reduction of sound. 2 Study of homeowner perceptions of leading national brands. Email: info@commercial-acoustics. About STC Ratings. Sep 21, 2018 · When looking at STC ratings for windows and doors be aware that the glass manufacturers publish values for the glass they produce. 24 Page 1 of 7 Oct 16, 2023 · acoustical ratings not available for this glass combination glass combination X--> X 30 27 04/12/23--> X 34 29 12/14/22 OITC Test Date Test Number Intercept or Cardinal horizontal slider 6110 6111 6130 6130J 6170 size tested net 59" x 47" STC 29-34 X X <--32 Operating Style Series Numbers Glass 1 Glass 2 Spacer STC TL22-271 28 12/14/22 TL22-270 Standard windows offer sound control up to an STC rating of 30. 030" PVB : 3 mm 28 32 3 mm : Standard 0. Assemblies will be organized by STC value ranging from an STC of 40 to an STC of 57. STC 33-41 Singles Seal Set 41 - Pemko. Feb 12, 2024 · American Window Company Showroom Covina Location 803 N. SUSTAINABILITY. Ratings must be determined in accordance with CAN/ULC-S101-14, “Fire Endurance 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. … 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. Another common misconception about STC is that it can be added- for instance, if two walls have STC rating of 30 and 40 respectively and if they are installed back to back next to each other, then the combined STC will NOT be 70. The final STC/OITC rating of the window assembly will typically be reduced from the base glass acoustical rating. 24 mm) 1/8" 0. 1-866-949-9269. Heavy duty. 800-782-5742 Talk to an expert! To make ordering STC rated doors from TruStile easier, we have tested our MDF and Wood Doors with hardware packages from Zero International. A standard wall will have an STC rating of 35-45. STC 52 Single 2" x 4" (51 mm x 102 mm) wood studs 24" OC (610 mm), resilient channels: single layer 5/ 8" (16 mm) Type X gypsum board each side; one thickness 35/ 8" (92 mm) JM Formaldehyde-free thermal/acoustical fiber glass batts. Noise is one of the single most common complaints at hotels, condos, and other commercial properties. Learn why STC ratings matter for soundproofing. Costing more than other materials, this is used mainly for exterior applications. While hardwood is a great material, it can get very expensive. 3. Typically the material with the lowest resistance to the passage of sound has the greatest impact on a partition's STC value. STC 46-47 Vert-Rod Pairs Seal • For doors with glass kits, the STC rating decreases as the glass kit size increases –Use of laminated glass with an air pocket is recommended to help reduce the transmission of sound waves • Door openings rated up to STC 54 generally can be a standard 1¾” thick. QUALITY STANDARDS. Pre-drilled hinge pilot holes; all cutouts for Mar 5, 2025 · 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 Normal replacement windows can have window STC ratings anywhere from 18 to 38. 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. Glendora Ave. A higher STC rating translates into more reduction in sound. If you add standard fiberglass insulation to the wall, your STC jumps to around 39. Be sure to specify full thick - (1) Maximum performance for single unit when glazed with the appropriate glass thickness. Nov 7, 2016 · Looking at the chart above, once a wall gets to an STC of 45, loud speech is audible but not understandable. STC 33-41 Singles Seal Set 1 - Pemko. Old aluminum and wood windows are rated even lower. 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. 2. 7 Protection of Connections . Double wood studs on separate Plates future date. 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 Sound Insulation. This rating is given to materials that are tested over a range of frequencies, and are proven to block sound in some capacity. Wood doors are available with custom stain match or clear coat inishes. Dec 22, 2022 · Double-glazed glass can also provide an STC rating of up to 40. STC . 7. Doors are 1¾” thick through STC 50. We display these packages as Package A, B and C in the tables below. It includes STC ratings for commonly used materials such as: Select materials for sound absorption according to their STC ratings. *OITC is estimated based on this test. STC is widely used to rate interior partitions, ceilings/floors, doors, and windows. The STC of the plot yours is closest to becomes the STC rating for your object. 3 Supporting Construction . Caution: You cannot add STC ratings. Understanding STC Tested and certified acoustical glass or fire-rated glass and glazing materials are available for acoustical door assemblies with vision lites, side lites, or transoms. See written limited May 22, 2022 · The higher a material’s STC rating, the more sound it blocks. FSC* 1/4" laminated glass & wood stops . ACOUSTICAL RATING. 22. Door Material. A typical replacement window has an STC rating of 25 to 34, while a noise control window typically has an STC rating of 35 to 50. Suite 100 Houston, TX 77090 Tel: 713-692-5222 Fax: 713-692-1391 E-mail: [email protected] 3/4" Wood Flooring 3/4" Wood Subflooring 3"x14" Wood Joist Supported on 15"x15" Exposed Wood Beams: NIC 28: FIIC 22: AT001099A: AT001099: 3/4" Wood Flooring 3/4" Wood Subflooring 3"x14" Wood Joist Supported on 15"x15" Exposed Wood Beams Attachment to Wood Joist KINETICS ICW Hanger Cold Rolled Channel 3-1/2" Fiber Glass Batt Insulation Drywall The U. We carry STC Ratings anywhere from STC 26 all the way up to STC 70. 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. STC 32 Single Seal Set 32 - Pemko. 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 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. Consult VT for lite & glass approvals. In a system using gypsum boards on 2x4s, the STC rating varies depending spacing. 5” Acoustics Assembly Number: ISS-02 STC: 43 OITC: 28 Report No. You can see in this chart from Acoustical Solutions that each STC number correlates to the volume of speech heard through a • Acoustic wood door and steel frame assemblies are available in STC ratings up to & including STC 56. Laboratory testing is used to measure the resistance of partitions such as walls, windows, or entry doors to the passage of sound. Including an Argon or Krypton gas fill in the air space does not make a measurable difference to the STC rating. Covina, CA 91724 P: 626-967-4043 4 days ago · Acoustic wood doors, measured by their Sound Transmission Class (STC) ratings, are engineered to reduce sound transmission between rooms, creating quieter, more productive, and private spaces. 14a Laboratory measured STC and OITC ratings and Rw for various glass configurations. What Is a Good STC Rating? An excellent rating is an STC of 60 or higher. Adjustable blinds in between the panes of glass are available to control the amount of light and provide added privacy and security. 2. High Range STC 43 - 45. Acoustical Performance of Glass and Wall Constructions Overall Thickness Inside Construction Space Outside STC Value ISO RW 3 1/4" (7. STC 40-47 Embossed Singles Seal Set 6 - Pemko. Perforated Wood Art Panels; Table of Contents: What is STC Rating Aug 9, 2017 · A ULC Listing showing that the sound-insulating assemblies specified in the Sound transmission class (STC) rating table meet the Code’s fire-rating requirements is required in buildings where the NBC 2015 requires a fire-resistance rating for wall assemblies. 4. Jul 2, 1997 · to be listed and labeled in accordance with UBC 7-2-1997 and UL 10C-1998 for use in positive pressure fire-rated wood doors if located above 40" AFF. The STC rating goes all the way up to 65. com. On the Several STC ratings for interior doors are 1/4” lam. VT Door Types . When deciding what STC rating you should specify; use the following chart to in light your decision: STC: 1/2" plate glass: 38: 1/2" drywall on wood studs, both Class (STC) rating. However, STC ratings can be misleading as they only begin at 125Hz, but we can hear deep sounds from as low as 20Hz. components. Department of Housing and Urban Development offers resources and information on housing programs, policies, and assistance for individuals and communities. 060” PVB : 3 mm 28 32 6 mm : Standard 0. Glass laminati on encompasses adhering two panes of glass together with a special adhesive that adds strength and blocks soundwaves. 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 noise Jan 18, 2022 · STC Ratings Updated : 01/18/2022 by K. Something important to keep in mind when reviewing STC ratings is that two numbers that are The STC and IIC ratings 1. STC 31 Contour Curve Wall System with Sprayed Closed Cell Foam (Full Cavity) † Intertek Report Number K2810. STC 42-49 Vert-Rod Pairs Seal Set 13 - Pemko. On the VTonline Door Entry screen, the “STC Void” check box has been changed to “STC Unknown” and an STC button has been added. See Design Data pages in this section for specific product performance class and grade values. Making the doors operable, with a good sound seal around the perimeter of the frame and an automatic door bottom, the STC rating will be reduced by one (1) or two (2) decibel The STC Rating can improve from 28 (Dual 1/8" glass panes with 3/8" air space) to 41 when SoundTITE is added. An STC rating of 35 or higher is typical for interior commercial doors where sound isolation is critical, such as executive offices, classrooms, or Vitro Architectural Glass PAGE 3 OF 4 GENERIC STC and OITC RATINGS Not to be used for design or specification purposes 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 glass constructions only. Laminated and double-glazed glass both hold STC ratings of 40, but anything higher typically requires a combination of the two. Type 1 adhesive. Web Viracon - Your Single-Source Architectural Glass Fabricator. 6. 24 Page 1 of 7 Glass 3 Spacer STC OITC Test Date Test Number Operating Style Series Numbers Phone: 888-815-9691. 6 Truss Protection . One is timber, or hardwood, and the other is steel. If thicker glass material is used, the rating can go up to 35. 1 Fire-Resistance-Rated Construction . Calculate What You Need for the Improvements You Want. 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. NWTL140828-03 STC 40 Assembly Components Finish material 1/ OA Glass 1 Glass 2 Acoustical Ratings - Ultra I C650 updated 04. These high-performance door systems offer Sound Transmission Class (STC) ratings up to 66 for superior noise control. Understanding STC Ratings for Drywall. Fire Rating . Construction with spacing of 32” on center has the best rating (STC 38) while 12” on center construction drops the rating to 32. Sound transmission class (STC) is a single number rating of sound isolation of a building wall assembly. • Door openings rated STC 55+ can only be achieved with Jan 20, 2022 · Learn how to determine the STC rating of a wall. 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. Resilient channel can improve the STC rating of an assembly. 2 Continuity of Fire -Resistance Rating . For example, a standard interior wall, meaning two sheets of ½ inch drywall separated by wood studs and no insulation, provides an stc rating of 33, which. The greatest lower ing (2 to 8 STC units) was for assemblies with a single layer of 5/8” Type X gypsum b oard on each side of thee steel stud assembly. com (blocks 30 decibels) You should be able to get either for under • Acoustic wood door and steel frame assemblies are available in STC ratings up to & including STC 56. STC ratings are used to measure the effectiveness of these products, such as doors. . VT's Sound-Resistant STC Doors. Address: 6301 N Florida Ave Tampa, FL 33604 Acoustical Doors section you will find the STC Door Chart. STC 57 Single 2" x 4" (51 mm x 102 mm) wood studs 24 OC (610 mm), resilient channels: double layer 1/ For simplification, we have segmented NanaWall sound-rated opening glass wall solutions into three categories. It’s a single number that’s used to compare the sound isolation performance of different materials. However, a thermally broken frame made out of aluminum that has glass-reinforced polyamide plastic thermal breaks will most likely outperform the wood system and generate an overall STC rating nearly comparable to that of its glass. Without gasketing these doors have no sound control and test to an STC rating between 15 and 20. STC 57 Single 2" x 4" (51 mm x 102 mm) wood studs 24 OC (610 mm), resilient channels: double layer 1/ insulating glass units. A high STC rating is better than a low one. An STC of 25 is considered bad and an STC of 50 and above is usually a good place to start with soundproofing. S. 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+. 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. STC. In the US, it is widely used to rate interior partitions, ceilings, floors, doors, windows and exterior wall configurations. (2) The higher the level, the greater the product's ability to resist forced entry. Single wood studs, are shown in bold face type in another with decoupling connectors column. Double-Glazed Jul 31, 2022 · Made of glass and wood or metal, French doors have varying STC ratings depending on glass thickness and door frame construction. Acoustical Guide – Determining Minimum STC Rating Figure 1. Jun 12, 2018 · With regard to framing for instance, wood contributes more STL to fenestration than would your standard metal frame. 1/8" 35 35 STC is Sound Transmission Class which is a single number rating derived from individual transmittance losses at specified test frequencies. The effective sound transmission reduction is over 70% (Particularly effective in 250-4000 Hz range) As determined by Acoustical Systems, Austin, TX NVLAP Lab Code# 100286-0, ASTM-E90 Test AS-TL2739. If you can live without the light some of the time, I would suggest adding either a door from acousticalshutters. OITC* Frequency (Hz) 100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 1/8" glass, . Lower Range Up to STC 35. 030" PVB, 1/8" glass, 1/2" airspace, 1/8" glass, . 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 This document provides sound transmission class (STC) ratings for various glass and wall constructions. Study commissioned by Pella, 2023. Understanding the STC ratings for floors is essential when designing a space that requires soundproofing, such as an apartment building or a commercial space with multiple floors. Variations could affect the STC rating of the opening However, it is important to note that different glass options and the use of combination units may affect the sound abatement performance of the unit. Staggered or double stud walls are higher rated than single stud walls. Solid core wood doors with gasketing test to an STC rating of approximately 28 to 30. 8 Intersections of Fire-Resistance Rated 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 wall, painted both sides: 33: Single layer of 1/2″ drywall on each side, wood studs, fiberglass insulation: 39: Hollow CMU (Concrete Masonry Unit) 4″ 44 b atts w ith 8 9mm Fib er Glass (FG) b atts (with I-I single layer gyp sum each side) gave low er STC assemb ly performance for MW b atts. May 22, 2022 · And glass in the door lowers the overall STC rating even more. Designed with cutting-edge technology, Acoustical Openings by Ceco Door provide premium sound control solutions for a wide range of applications, including government, military, healthcare, education, and performance spaces. This is different from the rating of that same glass once included into a window frame. The higher the STC rating, the better the material is at reducing sound. They are logarithmic values and cannot simply be added. V. 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. Jul 11, 2022 · The Basics of STC Ratings. LEVEL. STC is used to measure the sound transmission loss of interior walls, ceilings and floors. Wood frames are available up to STC 45 • Face veneers are available in virtually every species, cut & grade. 4. 7 Fire-Resistance-Rated Wood Members and Wood Assemblies . The STC rating figure represents approximately the decibel reduction in noise that the assembly can provide. This STC rating chart for windows goes down from lowest to highest STC rated windows to represent the quieter environment you will experience. Mid Range STC 36 - 42. STC stands for (Sound Transmission Class). Mar 7, 2025 · Explore the STC rating chart for walls, glass, windows, doors, and materials. Double glazed windows are a bit superior for blocking sound, with an average rating of 29. For this reason, STC (Sound Transmission Class) ratings have become a primary consideration when choosing doors for large-scale projects. STC Rating Chart For Windows. Menu. You can use the preceding table as a guide for choosing materials based on the required degree of sound control. Web E413 Classification for Rating Sound Insulation E1425 Standard Practice for Determining. Web Sound Transmission Class or STC is an integer rating of how Please inspect the area with sealant surrounding the panels and/or glass for the presence of wood dust or wood chips. The STC (Sound Transmission Class) rating is a single-number rating system for interior building partitions and viewing windows used to categorize acoustic performance. There are two primary materials for STC Rated Doors. 030” PVB : 6 mm 32 36 Dec 31, 2024 · Gaps or weaknesses in the frame can compromise the STC rating. Web insulating glass units. 3 Based on comparing written limited warranties of leading national wood window and wood patio door brands. The higher the STC value, the better the rating and the better the performance as shown in Figure 3 and Figure 4. 05-113-11-R0 † Testing was conducted on 10/21/19 1/2” Gypsum Board 2”x4” Wood Framing Cavity Insulation: Closed Cell Foam OSB Sheathing Tyvek House Wrap Vinyl Siding STC 33 OITC 25 STC 31 OITC 24 STC 34 OITC 25 Sound Transmission Class (or STC) is an integer rating of how well a building partition attenuates airborne sound. Pocket Doors. All of these ratings are for operable single swing doors with the sound control hardware specified in the right hand side of each table Jun 15, 2024 · A basic wood structure floor/ceiling typically has an STC rating of 40-43, while a six-inch concrete sub-floor has a rating of 52-55. When this is checked, the standard door construction is being used but something being entered may affect the actual STC rating achieved. Down to 35 – 40. For extra heavy duty, blocking for hardware is required. Mar 5, 2021 · STC stands for sound transmission classification. Weight varies by STC rating & core type; Consult with VT. STC 42 -49 Pairs Seal Set 4 - Pemko. Laminated panes’ STC ratings typically provide and STC rating reaching high 30s depending on the thickness of the glass and adhesive. Metal stud walls perform better than wood stud walls. The higher the STC rating, the better the sound isolation. Jan 28, 2024 · The average STC rating for a regular single pane window is 27. You might get something around STC 35. Address: 6301 N Florida Ave Tampa, FL 33604 STC ratings allow to accurately compare noise reduction capabilities by using a single value for the acoustical performance of a door. Each frequency is assigned a decibel rating. Calculating the required improvement involves subtracting the target STC rating from the existing STC Mar 30, 2023 · For example, a standard interior wall, meaning two sheets of ½ inch drywall separated by wood studs and no insulation, provides an STC rating of 33, which provides almost no soundproofing. Adding additional layers of drywall can improve the STC rating of an assembly. This can easily be accomplished using one of two methods: Use a soft to medium bristle brush to remove wood particles. Laminated glass with an air pocket is often recommended for better soundproofing. Double-Glazed 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. STC 43 Assembly Components Finish material 5/8” Gypsum Size 3 5/8” Steel Stud Spacing 16” oc Product AFB Thickness 3. The column with the three dots is 1. 5. Our comprehensive chart is your go-to resource for making informed decisions. 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. Nov 17, 2023 · Stc Rating Glass Chart - The performance data below applies to an insulating unit constructed with two plies of glass and an air or argon filled space. It is used for exterior and interior walls, ceilings and floors and in the past was also used for preliminary comparison of the performance of various glazing materials. STC 33-38 Single Seal Set 38 - Pemko. Acoustic products are given two STC ratings, one of which is a “sealed in place” rating, and the other is an “operable mineral cores have an STC rating of 33 to 34. Ad We Beat Any Competitor Price By 10. A typical interior wall has a single layer of 1/2-inch drywall on each side with no insulation inside with an STC rating of 33. Anything below 40" AFF can follow existing standards. Laminating glass is a popular way to increase an STC rating. 030 P. E413-87 in an acoustical wall. DOOR WEIGHT. WDMA PERFORMANCE. Seals and Gasketing: Even the highest-rated door will perform poorly without effective STC Capability Chart. * STC Ratings Chart Acoustical Performance of Glass and Wall Constructions Inside Construction Space Outside STC Value ISO RW 3 Single Laminated Glass 1 1/4" (7. STC 35-52. C1. There are many types of wood door options, many of which are not entirely wood. After sealed IG units were installed into the laboratory test opening, the first glass panel and wood spacers were used to complete the triple glass configurations. product quotes and published STC/OITC and U-Factor ratings of leading national wood window and patio door brands. glass batts. 030" PVB Laminating glass is a popular way to increase an STC rating. 5 Beam Protection . 3. 03. Many test CAM does not address shear panels, but a National Research Council Canada (NRC) report ‘Solution for mid-rise wood construction: full-scale standard fire resistance tests of wall assemblies for use in lower storeys of mid-rise buildings: report to Research Consortium for Wood and Wood-Hybrid Mid-Rise Buildings’ shows that adding an OSB Typical dual glazed windows can achieve better ratings of 25-27. Staggered wood studs on single plates for information which may be added at a 1. As a point of reference, sound studios typically have an STC rating of 50 and higher. STC 46-47 Pairs Seal Set 3 - Pemko. 24 Insulation will noticeably improve the STC rating of an assembly. Glass size and glazing system will affect STC rating. Determine Target STCs Estimates of Laboratory-Based Center-of-Glass Performance Category Glazing Composition OITC Rating STC Rating Single Pane 3 mm 22 28 6 mm 28 30 8 mm 29 32 10 mm 32 34 12 mm 33 36 Single Pane Laminated 3 mm : Standard 0. Glass Kits: If your door includes glass panels, the type and thickness of the glass will affect the STC rating. Oct 13, 2021 · 1910 Cypress Station Dr. Pocket doors slide into a wall cavity and have STC ratings from 25 to 40, depending on material and thickness. When tested in the field, an STC rating of a wall assembly will almost always be lower than the lab May 14, 2021 · C1. Understanding STC ratings for drywall can be complex. The higher the rating, the higher the effectiveness in reducing sound. Laminated & Double-Glaze Combinations. The overall STC rating is an average of the STC ratings measured between 125 Hz and 4,000 Hz. At this rating, you may be able to hear very loud sounds faintly, but most sounds you won’t hear at all. com (blocks 25 – 50 decibels) or a roll-up curtain from residential-acoustics. How Is the STC Rating Determined? STC ratings represent the average amount of noise prevented using 18 different sound frequencies. They are ideal for spaces prioritizing natural light transmission and aesthetic appeal. Designed with cutting-edge technology, Acoustical Openings by CURRIES provide premium sound control solutions for a wide range of applications, including government, military, healthcare, education, and performance spaces. Is Complete Soundproofing Possible? Our STC rating chart above only goes to 50 because STC rated windows are in that range. ufmitaa wvuv mxcdog detfn uwtl aumjl abpk ccpi xavw fvmfup vfws ydyf cezj jbmxq zudgu