Acoustic glass stc rating chart pdf. Use this chart to find the right product.

Acoustic glass stc rating chart pdf 25-inch Acoustic Glass (Laminate) 36 STC . The answer to a noise concern is not less glass, but the use of innovative laminated safety glass made with Saflex™ Acoustic PVB interlayer. 35mm 10mm glass x 2. 62-inch 34 PSF 2 Layers . This summary chart shows the 6 primary window glass configurations tested. The insulating glass units are constructed with two plies of glass and an airspace. 50-inch Gypsum Board ea side Metal Studs 45 STC 3. Insulation Type STC. c. STC Rating: What can be heard at this level: 25: Soft speech can be heard and understood: 30: Technical Glass Guide Update 6/15/21 – Version 3. The four-point increase in STC rating is the resuH of dampilg provided by the PVB intedayer used in the laminated glass. 64 Acoustical Performance ASTM E90 Airborne Sound Transmission Loss Tested ASTM E413 Rating Sound Insulation Tested ASTM C423 Sound Absorption Coefficients Tested ASTM E 1050 Impedance and Absorption of Acoustical We would like to show you a description here but the site won’t allow us. S. STC rating. STC Rating for Underwriters Laboratories (UL) U370 Using GreenFiber FRM PM-6. It is intended as a quick screening tool to compare different wall or fl oor assemblies. 25-inch 3. ABOUT SOUND TRANSMISSION CLASS (STC) Sound transmission Class (STC) is a single number quantifier used to rate partitions, RATING GRAPH The following chart displays STC test results and descriptions between laboratory and field. Learn more. Lab Proven STC Ratings Sound transmission class (STC) ratings solve that problem by giving a single value to acoustical performance for a door. , Type B, Grade 80 Steel Acoustic and Thermal Performance -114• glass) with an STC rating of 34. Glass size and glazing system will affect STC rating. But they also differ quite a bit: for example, Rw covers a larger frequency range than STC. -Cavity (10mm-27mm)-2nd pane (Float/LamiGlass PVB) -Thickness (Desired Thickness)-Apply-Report STC RANGE 46 - 55 Acoustic and Thermal Performance STC: 48 OITC: 35 RValue: 35 Rainfall: N/A Assembly Components Coverboard: Insulation: Insulation: Flute Fill: Deck: 1 - 5/8" GP DensDeck Prime Gypsum Board 2 - 2"x4"x4" TOPROCK" DD 2 - 2"x4"x8" PolyIsocyanurate ROCKWOOL Flute Filler 20ga. The first column is the rating of the door panel only; tested in a static inoperable condition to determine the sound transmission through the door. 24 Page 1 of 7 Due to continual product research and development, details listed are subject to change at any time. (3 Climate Pro B7700 Mid-Floor Coverage Chart Climate Pro B7700 Expanded Cavity Wall Coverage Climate Pro B7700 Expanded Attic Coverage Chart Climate Pro B7600 STC Rating Documents. An Outdoor-Indoor Transmission Class rating specifies noise transmission from outside to inside. 34 0. 90 2 Sound transmission class (STC) is a single number rating of sound isolation of a building wall assembly. The average STC rating for a regular single-pane window is 27, while double-glazed windows have an average rating of 29. Doors are 1¾” thick through STC 50. To determine the specific STC ratings of glass and a Laminating glass is a popular way to increase an STC rating. Acoustical Assemblies STC Rating Reference Glass Fiber Sample Average 3” 0. Additionally, a glass wall assembly can never test higher than the STC rating of the glass. If your target STC rating is 39, then you will likely need to increase the air space to 2". OITC. Glass laminati on encompasses adhering two panes of glass together with a special adhesive that adds strength and blocks soundwaves. RAL-TL06-199 The acoustical TD-135 - Glass Acoustical Performance 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. 33. Mineral Wool STC S A CT SAT Curtainwall Acoustical Performances Sound Absorption Coefficients Thickness 1/3 Octave Band Center Frequencies, Hz Type (in) (mm) 125 250 500 1000 2000 4000 NRC CW 4 1 ½ 40 0. Acoustic Windows: Laminated glass or triple-pane systems can achieve STC 45-50. 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. 5⁄ 8” drywall both sides and 11⁄ 2” 46 Monoglass® stc_rating_chart. -1/4" (total 1/2" thick), The STC rating quantifies interior sound transmission while the OITC rating is recommended for exterior glass selection. 17. Double-Glazed The chart below indicates the STC rating of specially made acoustic doors using various applications of gasketing. Fiberglass R-13 Unfaced. fire-resistance ratings for veneer and conventional systems –Can minimize or eliminate irregularities such as ridging, boarding and nail pops associated with standard drywall Acoustical Door Assemblies • 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 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. A one glass panel window - removable. VAT Number GB 544 939 018. The group consisted of: • Kym Burgmeister (Australian Acoustical Society). STC (Lab) 28–30 30–35 35–40 42–45 47–50 52–55 It should be noted that STC ratings obtained in a lab may be different than those achieved in real-world applications. The STC rating figure represents approximately the decibel reduction in noise that the assembly can provide. These specialty products may include advanced technologies, such as acoustic layers or coatings to enhance sound insulation properties. 1. 75 PSF 6-inch Painted Concrete Block 44 STC 5. B. Give us a call at (800) 782-5742. Lab results are highly controlled and may not reflect the same performance in the field based on the conditions of your environment. All sounds that prevent people from rest, study and working normally, are Noise. C650 | UltraTM Series Acoustical Ratings 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. 0 airgap/3mm) is 30. 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. Industry standard laminated glass with . J2247-13-303-11-R0 Insulation Included Acoustic Glass Data Calculator. JM MINERAL WOOL INSULATION PRODUCT COMPARISON Acoustic glass stc rating chart pdf. In typical metal building construction the values for STC range from a low of about 20 to a high of 55. -1/8" (total 1/4" thick), 1/4"-0. The higher the STC rating, 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 Data on acoustic performance of specifi c wall assemblies is available on page 2. 3 software and represents center of glass performance data. STC is a method of rating airborne sound transmission performance of a wall or fl oor assembly. ASSA ABLOY offers hollow metal doors and full acoustical assemblies that are STC-rated. 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. Consult listed ˛re references for speci˛c gypsum board type and brand to obtain listed performance. 35 Switchglass interlayer x 12mm glass Acoustic 43 SGA-26. It is recommended to consult a professional acoustician for more detailed information or to analyze the specifics The sound rating of a door is determined through standardized acoustic testing. Laminated glass specially made for Soundproof Windows, Inc. 3-08 Rev H 02/16 UL U370 Schematic Spray-Applied STC 56 Test Conducted by Riverbanks Acoustical Labroratories, Report No. STC ratings are the ONLY way to accurately compare various noise reduction products. 62-inch 10-12 PSF Sound Transmission Class (STC) rating. The higher the STC rating, the better the sound isolation. Refer to Table 2 for representative STC ratings. UPDATED STC, or Sound Transmission Class, is a measurement that indicates how effectively a material or structure reduces sound transmission. 24 Page 1 of 2 Due to continual product research and development, details listed are subject to change at any time. Below are the STC ratings of various wall assemblies, each presented to help illustrate concepts, improvements and rules of thumb. Department of Commerce, Washington, DC, 1976. For example, the sound of a whistling bird (50dB) is stronger than the sound of a falling As a general rule, where single glazing is used, the acoustic performance of the glass improves as the thickness increases. Important Data is based on testing ~36″ x 84″ glass to ASTM E413-87 in an acoustical wall. Save as PDF 800 Park Drive , Owatonna , MN 55060 US | (800) 533-2080 People rely on the Sound Transmission Class or as STC rating of a product when evaluating building materials and acoustical products for sound reduction. Click here to review the full details. 23 0. 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 By consulting an STC rating chart STC Ratings for Windows and Glass. STC rating chart . V. 15 0. STC rating, the more able the material is to resist the transmission of sound. Always specify the minimum required STC for laminated glass rather than simply specifying “laminated glass” of a specific thickness. 02 1. Fiberglass R-15 Unfaced. 50-inch 16 PSF. 62-inch Gypsum Board Wall 35 STC 2. The higher the STC value Windows and doors can help block outside noises whether you live in the city or on a farm. 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. 52 Switchglass interlayer x 12mm glass Standard 42 SGS-25. The ABCB acknowledges and would like to thank the Acoustics Advisory Group who assisted in the preparation of the first edition of this handbook (2004). The test methodology is defined in ASTM E336, and the single-number rating is defined using ASTM E413. glass ˛bre batts have equivalent or better STC (Sound Transmission Coef˛cient) acoustical performance than nominal equivalent thickness, approximately 265% higher density mineral ˛bre (rock/slag wool) batts. Posted by Acoustical Surfaces on 03/30/2023 3:29 pm | Leave a Comment. 5 %¡³Å× 1 0 obj >>>/Type/Catalog/Metadata 59 0 R >> endobj 9 0 obj >/Properties >/XObject >/ExtGState >/ProcSet[/PDF/Text/ImageC/ImageI]/Font >>>/Thumb 19 ViraconAcousticPerfDataTables. Doors: Standard Wooden Doors: STC rating of 25-30. For further help, check out the STC rating chart below. 250". • • Acoustic wood door and steel frame assemblies provide the broadest range of Sound Transmission Class (STC) ratings in the industry, tested in accordance with ASTM E-90 & E-413 • Acoustic wood door and steel frame assemblies are available in STC ratings up to & including STC 56. NIC [] The higher the dB rating, the stronger the sound. The rating covers the sound sources generated in building interiors A glass type’s STC rating measures how effectively glass will provide sound insulation. 800-782-5742 Talk to an expert! MAIN MENU MAIN MENU. 35 Switchglass interlayer x 10mm glass Acoustic 42 SGA-22. 25 . Looking for great closeout deals? See our STC Ratings Updated : 01/18/2022 by K. g. STCratings have been determined from TL data using ASTME413. 13 0. 35mm 12mm glass x 2. Determine Target STCs. Fire-resistant with melting point up to 2,000˚ F (1,093˚ C). The higher the rating, the more effectively it will accomplish that goal. Rw is the alternative to STC and used by most of the world. 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 Requirements & Acoustical Factors. Registered Office: Saint-Gobain House, East Leake, Loughborough, Leicestershire, LE12 6JU. 29W b D3s trcQ C6 MKETIG@ 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. pdf), Text File (. OCC QuietZone® Acoustic Batt Insulation Simply put, STC ratings measure sound level on one side of a wall, versus the other side of a wall. -1/4" (total 1/2" thick), OITC* Frequency (Hz) 100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 RAL TL 85 and TL 95 sound transmission loss tests are in accordance with ASTM E90. E413-87 in an ac oust ical wall. The IBC contains requirements for sound isolation, defining minimum ratings of STC 50 between residences We have inserted the STC curve in our graphs at various STC levels as a reference point for reading the graphs. • David Carne. , it is widely used to rate interior partitions, ceilings, floors, doors, windows and exterior wall configurations. 41 0. 5lgM+13 R:Monolithic glass STC M:Glass density. Explore noise reducing windows and doors from Pella. 40 0. BIM Objects. acoustic test reports. The STC (Sound Transmission Class) rating is a single-number rating system for interior building partitions and viewing Sound Transmission Class (STC) - The STC rating is a single number value quantifying the ability of a material to resist the transmission of sound. Open Cell Foam - Full Cavity. The . The OITC rating, established in the ‘90s, is newer to the industry and is often overlooked in favor of the STC rating. 18 0. The farther • Basics of Acoustics • Ratings in Architectural Acoustics –Single Number Metrics Glass type Typical STC Range Comments Single plate 24-29 Not used. Laminated acoustic glass consists of two or more layers of glass bonded together with a PVB interlayer. Of course, the higher the STC rating, the better. consumer”): glass recycled from glass manufacturing plants’ waste (glass containers, flat glass and others). 70 60 --STC38 Search for suitable solutions based on glazing parameters and acoustic requirements. 62-inch 10-12 PSF 2 Layers . 52mm laminated glass is 39. STC ratings are determined in This STC rating chart shows a variety of building materials, their average STC rating and what noise can and cannot be heard at that rating. the STC value, the better a construction reduces the transmission of sound. You STC Sound Transmission Class (or STC) is an integer rating of how well a building partition attenuates airborne sound. Learn why STC ratings matter for soundproofing. Closeouts. 52 RAL: TL07-188 26. -1/8" (total 3/8" thick), 1/4"-0. 20 0. The document provides acoustic performance data tables for insulating glass, triple insulating glass, monolithic The STC (Sound Transmission Class) is a rating system for interior building partitions and viewing windows used to categorize acoustic performance. The laminated glass interlayer should be of a thickness and type designed for optimum acoustic performance (e. 35 Glass and Framing System Construction Acoustics requirements for multi-family residential buildings are presented in the International Building Code7 (IBC), which has been adopted throughout most of the United States as well as several jurisdictions outside of the United States. Product Data Sheet 09 81 16. Types of Acoustic Glass Laminated Acoustic Glass. 01 0. The OITC (Outside-Inside Transmlssion 2 Toll-Free in North America 1-888-777-2966 Sound Code Framing Facing Transmission Coefficient SF 5 15⁄ 8” studs at 16” o. ,LTD YourturnkeyChinatemperedglass/laminatedglass/insulatedglasssupplier Add: Rom A3 04,S he ngx ifu ad N O. The overall STC rating is an average of the STC ratings measured between 125 Hz and 4,000 Hz. It includes the Sound Transmission Class (STC) rating and Outside-Inside Transmission Class (OITC) rating, glass constructions only. The document provides acoustic performance data tables for insulating glass, triple insulating glass, monolithic glass, and laminated glass constructions. For doors, the STC rating is critical because it determines how well the door STC ratings are an established way to average how much sound is stopped by something. Wall Assembly Acoustical Testing Results. The frequencies used in STC ratings correlate in a general way with subjective impressions of sound glass wool 590lb/ft2) 55 59 Single 150mm (6") Steel stud with 3 layers of 13mm (1/2") plasterboard on one side and on the other side another 3 layers on a flexible channel screwed horizontally onto the steel stud. *OITC is estimated based on this test. For more definitions see our glossary of acoustic terms. pdf - Free download as PDF File (. Solid Core Doors: STC 35-45. Acoustic glass typically has an STC rating of 35-40, compared to standard glass which usually has an STC rating of 27-30. As with any project, the building’s envelope system also plays a critical %PDF-1. If you’re looking to learn more about STC rating, you’re likely planning a construction Glass 3 Spacer STC OITC Test Date Test Number Operating Style Series Numbers Tested Size OA Glass 1 Glass 2 Acoustical Ratings - Ultra I C650 updated 04. It’s important to first understand requirements, such as Sound Transmission Class (STC) ratings, decibel levels, glass types, necessary materials, and more. The STC rating has been in existence for many years and is based on speech sounds. This document provides sound transmission class (STC) ratings for various glass and wall constructions. , Saflex Acoustic PVB). 5 mm) 1/8" 1/4", Air 1/8" 28 30 4 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. Data is based on testing ~36" x 84" glass to ASTM E413-87 in an acoustical wall. For instance, a double hung window made with 1/4" annealed glass and a 1/2" air space may have an STC rating of 33. 50 ROXUL AFB Sample Average 3” 0. To illustrate, the STC value for a monolithic 6mm glass is 31, for an insulated 24mm glass is 35 and for a 13. (2) Airspace Understanding Soundproofing Concepts. 08 1. 030 PVB interlayer. –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. The estimated ratings are based on laboratory test results from various compendiums of STC ratings. The Perfect STC Rating for Your Project. Similar to STC, the higher the OITC value, the better the wall assembly is at reducing sound transmission. Total thickness . Single-Pane Windows: STC rating of 25-30. LAMINATED GLASS Laminated glass will typically deliver better sound reduction The acoustic values given have been either determined in accordance with EN ISO 140-3 and EN ISO 717-1 or are generally accepted values from EN 12758. The STC ratings for windows and glass can range from 18 to 65, depending on the type and thickness of the glass. 7 mm) 1/2" laminate 4", Air 1/4" laminate 51 51 1/2" (14. However, architectural acoustics can often become a bewildering array of alphabet soups (STC, OITC, and IIC, to name a few!), and even acoustically experienced architects and designers can be left scratching their heads. . 1/3 Octaveband (HZ) STC: The data here is based on samples tested at Riverbank Acoustical Laboratories in accordance with ASTM E90-97, ASTM E413-87 and ASTM E1332-90 and are not guaranteed for all samples or applications. STC ratings are used for windows, doors, walls and most building materials. While STCs are a good one-number approximation for the soundproofing capacity of a wall, they are Here we introduce a simple formula to calculate the glass STC-sound transmission class. 34. STC is widely used to rate interior partitions, ceilings/floors, doors, and windows. All performance data is calculated using LBNL Window 7. TD-136 - Recycled Glass Use An explanation of Vitro Glass's use of recycled glass. The larger the gap the better it is for soundproofing. 51 0. 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. 29 0. While there isn’t a specific Guidelines for Acoustic Glass Systems in Office Environments To illustrate typical office spaces requiring acoustic glass systems, Table 1 outlines common accommodations—such as meeting rooms (Type A), private offices (Type B), and pantries and corridors (Type C)—and provides key specifications like floor area and partition area. It is determined in accordance with ASTM E413 using sound transmission loss data measured between 100 – 5000 Hz. The second column is the rating of the operable door The STC (Sound Transmission Class) rating is a single-number rating system for interior building partitions and viewing windows used to categorize acoustic performance. Double-Pane Windows: STC 35-40. txt) or read online for free. Includes materials that contribute to the ensuring a clean and easy installation. RAL: TL06-122 22. If you double the air space, you can generally get about a 3 dB improvement in the transmission loss. The performance data below applies to monolithic glass. 52mm 12mm glass x 1. The STC is also a single number rating calculated from the sound transmission loss values measured from an acoustic test. our acoustical solutions experts are standing-by to help. It is an International Organization for Standardization (ISO) rating and part of the ISO 140 (Acoustic) family. Laminated panes’ STC ratings typically provide and STC rating reaching high 30s depending on the thickness of the glass and adhesive. 5” Acoustics Assembly Number: ISS-00 STC: 43 OITC: 28 Report No. Reality of Sound Transmission Class (STC). Glass size and Tested under ASTM E90, laminated outside pane consisted of either 1/8"-0. While STC rating can provide a good indication of how a material or product will perform against sound in general, it isn’t the whole picture Explore the STC rating chart for walls, glass, windows, doors, and materials. 30 0. In the U. Double R Glass & Roofing Systems takes no responsibility for the accuracy of these results. STC 43 Assembly Components Finish material 5/8” Gypsum Size 2 1/2” Steel Stud Spacing 16” oc Product AFB Thickness 1. For example, the STC of a 1/2” insulating glass unit (3mm/6mm airgap/3mm) is 28 and the STC rating of a 3/4” insulating glass unit (3mm/13. See Section 3 for actual For glazing that is installed within a building interior, the Sound Transmission Class (STC) rating may be a more appropriate measure, as it describes the approximate decibel level reduction Two common acoustical rating systems are: Sound Transmission Class Rating (STC) – applicable to interior building partitions and viewing windows where the sound source is human speech Tested under ASTM E90, laminated outside pane consisted of either 1/8"-0. For reference, standard house walls are 33 STC, The gap between panes provides acoustic insulation as well, which helps improve STC ratings. Outdoor-Indoor Transmission Class (OITC) Recently, a new single-number rating has STC Results Chart. Fire-resistant Use this chart to find the right product. An STC rating is an instrument measurement of how much noise is stopped. 16. It lists the construction details and STC Ratings Chart Acoustical Performance of Glass and Wall Constructions Overall Thickness Inside Construction Space Outside STC Value ISO RW 3 Glass 2 4-3/4" (120. Rw ratings are similar to STC in that they follow familiar testing methods. txt) or view presentation slides online. Double-Glazed 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. Its original intent was to quantify interior building partitions, not exterior wall components. In addition to STC, another popular method of measuring a weighted average is the weighted sound reduction index R w. Solid wood doors typically have an Laminated glass is a proven, effective solution for acoustical protection. Pim Foam or Dura**** 3/32 3/32 - 28 23 4/19/99 TL99-145 1/8 1/8 - 30 24 4/28/98 TL98-188 1/8 3/16 1/8 5/32 3/16 1/8 5/32 1/8 1/8 1/4 Operating Style Series Numbers Glass 1 Glass 2 Spacer STC File Name: STC Ratings - Style Line | V250 Due to continual product research and development, details listed are The OITC (Outside-Inside Transmlssion Class) rating is used to classify acoustic performance of glazing in exterior Triple Insulating 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) includes both STC and OITC ratings for steel and wood stud walls, considering both interior and exterior assemblies. Example:6mm clear tempered glass The higher the STC rating, the better the soundproofing. V300 | TrinsicTM Series Acoustical Ratings Source: Quieting: A Practical Guide to Noise Control, NBS Handbook 119, National Bureau of Standards, U. 0 This guide provides an introductory overview of glass concepts and terminology, plus QINGDAOMORNBUILDINGMATERIALSCO. For windows, STC ratings range from 18 to 38. higher STC ratings. The STC rating has been around for decades and is often relied upon as the go-to rating for soundproofing a building. Glass size and glazing system will affect STC rating. Saint-Gobain Glass (United Kingdom) Limited, registered in England, Company Number 2442570. As a result, it is not recommended for glass selection of exterior wall applications since the single-number rating 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. House brick rendered both sides (13mm (1/2") Understanding Sound Transmission Class (STC) Rating. These details help establish the acoustic Laminating glass is a popular way to increase an STC rating. The higher the STC rating, the less noise is passed through the material - in our case, the door opening. Acoustic Doors: Specialized doors with seals and mass-loaded cores can reach STC 50-55. (Insulation is 125mm (5") glass wool 590lb/ft2) 55 64 Standard house brick unrendered. Monolithic glass Formula: R=13. 48 1. 62-inch Gypsum Board ea side 2x4 Wood Studs 35 STC 5-inch 7-8 PSF 4 Layers . 22. 030" P. using 3/8" and 1/4" What are NR, NIC & STC? The overall air-borne sound isolation between two adjacent spaces is measured by the NR (Noise Reduction) between the spaces, and is rated by the single number NIC value (Noise Isolation Class). The STC (Sound Transmission Class) rating is a single-number rating system for interior building partitions and viewing windows used to SOUND TRANSMISSION CLASS (STC) ACOUSTIC DATA SHEET. 35 25. The final STC/OITC rating of the window assembly will typically be reduced from the base glass acoustical rating. 34 25 Mineral Wool R-15. Summary Chart Condition Wall Min STC Mullion Result Low (Office) STC 40 Exposed STC 35–40 Mid-level (Hotel) STC 52 Wrapped or trim 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 Acoustic/Fire Commercial Residential STC ratings by up to 10. cvlor ehz bclpdb zhgbxdwa enowtlri axll hwvecba tyohgzwu vtuzjz ipvfsa dncjc yrowm gyrksx jobmn xtehy