High oitc windows. ) air space, and 11-mm (7/16-in.
- High oitc windows SunGuard ® ClimaGuard ® Glass Types. values of insulating glass constructions. You get what you pay for though. Outdoor/Indoor Transmission Class (OITC) are measured in decibels (dB) and are the standard method for rating sound attenuation characteristics of glass products and window assemblies. As with The larger the air gap, the higher the STC your window pane will have, and this air gap will help reduce noise without compromising the clarity of your window. A higher sound transmission class rating indicates more effective sound insulation than a When it comes to selecting new windows for your home, there are a number of factors to consider, from the window color and operating style to energy efficiency. people saying your walls/ ceilings and your doors will become your weak link are correct butwindows especially if they are single pane are the single biggest This makes sound dampening windows an attractive upgrade for many homeowners that struggle with acoustic issues. °F Uw triple = 0. It needs windows anyway, so I figure if I am going to do it go for it. Schedule By selecting high-performance windows, you’re not only investing in your present comfort but also in your property’s future market appeal. For fenestration testing, transmission loss is recorded on either side of a window; the difference between the two results is the OITC rating. 1–0. For this reason, casements, awnings and fixed windows An outdoor-indoor transmission class rating chart is used to understand the decibel scale and its relation to OITC ratings. Warm edge with dessicant. Win-Vent Windows are used by building owners, contractors, and installers in commercial applications where high performance, heavy-duty, windows are required. As with STC, the higher the OITC number, the The product–quite often windows and doors–is then given its OITC rating. Front of house has two big windows, and two smaller ones, (4 if you count side ones on front half). Once the data is collected, Windows. Looks like a standard 2x pane is still sub 30 rating. Up to RC2. STC (Sound Transmission Class) STC is a rating system that measures how well a building partition attenuates airborne sou Comparison of OITC and STC Classes OITC STC Used for exterior noises specifi cally Sound rating for all common noises Best sound rating system to use for soundproof windows, doors, walls, etc. What’s a Good Sound Control Window Rating? In order to understand what constitutes a strong STC or OITC rating for a sound control window, it helps to have a general understanding of where the most common single and double-pane windows fall on the acoustic standard. STC 31-47 / OITC 20-37. 0. 14–0. Number of Panes. This means the more significant the difference between the sound transmitted from outside and the sound heard in the Windows with a higher glass-to-frame/sash ratio are likely to perform better, especially if the glass in the window is designed to achieve a higher STC rating. STC window rating depends upon several factors – glass thickness, laminated glass, the airspace between panes, and how and what A higher OITC rating indicates superior sound insulation against these types of noises. As with STC, the higher the OITC rating, the greater the sound insulation. Different window designs and technologies OITC: This is a much newer rating system developed specifically to measure the extent to which an exterior wall insulates against outdoor noises in the low- to midfrequency ranges: heavy traffic, airplanes, trains, etc. and viewing windows where the sound source is human speech and/or office equipment. Extras. All laminate See all the window color options and window designs available with Marvin Replacement. (STC) ratings as high as 60 and Outdoor Indoor Transmission Class Soundproof windows will help eliminate unwanted noises from entering your household. For example, it may be desirable for north facing windows to have a very low U-Factor and a high VLT, the SHGC is not important since those windows will only see direct sunlight MasterLine 8 is a high-quality window system that links countless design options to best-in-class performance and unrivalled production speed. U-value. i’ve built sound proof rooms for secure locations and one thing they all share is there are no windows. could be your go-to. High Altitude. Guardian ® Glass Steel 1 tree planted for . STC not less than 38; OITC ASTM E90 Acoustical (STC): up to STC 45; OITC 37. Our Alu7 frame offers optimal performance with OITC values up to 40 and up to 3 pane glass packets available. 21 VT 0. Window Options for Noise Reduction. *=testing incomplete as November, 2022 OITC/STC Outdoor/Indoor Transmission Class (OITC) and Sound Transmission Class (STC) are measurements of how much “soundproofing” a window provides. 14 - 10logΣ f10((L f - TL f + A f)/10) (dBA) Where: L f = reference source spectrum, A f = A-weighting adjustment, and TL f = specimen TL at each one-third octave frequency band. While OITC is often a slightly more appropriate way to evaluate windows, it isn’t nearly as recognized as STC, nor has it Most windows will have a lower OITC rating since it includes lower frequency noises than the STC rating, which makes it a better indicator for noise reduction for your windows. ft2. Block city noise and relax in peace at home. Our systems protect against blasts, hurricanes, and sound, while being energy efficient and quick and easy to But you have specifically referred to low frequency noise, and the attenuation of glazing products is characterised by a very significant drop in attenuation at lower frequencies (typically half the reduction at high frequencies) , plus a sharp dip at the windows resonant frequency, (possibly in the 3 to 5 kHz area). Unlike the STC rating (Sound Transmission Class), which measures the reduction of mid to high-frequency sounds like speech or television noise, OITC is tailored to assess the performance of materials in mitigating low-frequency outdoor noises. “Windows with a high STC rating typically have the same OITC rating as windows with a lesser STC rating, which can be a bit misleading. In one typical test on high-performance laminated insulating glass with a makeup of 8-mm (5/16-in. Tempered glass is ideal for windows close to the floor or located in high-traffic areas. Functional Window. 5 2 01 4 6 Double Vent 12060 48 S2009-553 HS-LC-25 0. OITC stands for outside-indoor transmission class. (STC) and Outdoor-Indoor Transmission Class (OITC) ratings. the more affordable CitiQuiet versus high-end industry leader Cityproof. Discover one If you live on a high-traffic street or within audible range of an airport, you likely want to consider upgrading your windows to reduce how much of this sound can be heard inside your home. Best sound rating system to use for common sounds like television, music, speech, etc. Go. McKenzie; Santiam; OITC is a more appropriate measure when comparing the true sound control performance of a window. Window insert. Windows. 20-0. OITC is based on a scale between 80 and 4,000 hertz. A barrier’s OITC rating is measured using data gathered over an 80 to 4000 hertz frequency range. (See Element Materials Technology One is Sound Transmission Class (STC). This is a bit of a no-brainer, but adding more panes of glass to your window increases its mass and improves sound blocking. STC 31-42/OITC 24-35. Assess your specific Highest STC/OITC Rated windows. Over the course of our 45 plus years in business, we’ve worked with architects, builders, contractors, and developers throughout the eastern states on a wide array of projects The Vi6 performance series, for example, offers superior soundproofing capabilities, significantly reducing external noise. (It's next to nothing. In conclusion, evaluating window frame materials for soundproofing OITC. Highway noise can make it hard to concentrate, especially during rush hour. Renewal by Andersen makes a very high quality window with a Casement/Awning Picture Windows (P5060 and smaller) Class LC-PG70 Size Tested 59" x 71" 70/70 29 25 < 0. In commercial contexts, some window and door systems have OITC ratings into the 40s. 1; 2; 3; Next. They specialize in high STC windows, perfect for keeping studio sessions crisp and clear. We’re focused on making our premium windows and doors more accessible, allowing more people to experience the advantages of high-performance windows. 3 The OITC rating system is important because it focuses on the types of sounds that are most challenging to block. A higher rated product will work better to block, and/or reduce, the lower frequency noise. They are verified by testing to ASTM E90 standards for sound transmission loss. The higher the OITC rating, the better a window is at reducing sound transmission. How Does STC Differ From OITC? OITC stands for outside-indoor transmission class. ) 5/32 – 25/64. 503-990-6924. 40. every window/ door sold. 24 Page 1 of 7 Due to continual product research and development, details listed are subject to change at any time. These frequencies have a wider range – 80 Hz to 4000 Hz – in order to account for lower-level noises often heard outdoors, such as traffic and airplanes. For example, for northern climates, your U-Factor should be ≤ 0. As you can see, the higher the STC rating of the window by itself, the more soundproofing the window seal kit can offer. Series. A 1/4″ pane of glass with an STC of 31, has an OITC rating of 29, and a double 1/4″ pane window with 1/2″ of air between drops from an STC 0f 38 to an OITC of 34. OITC = 44 dB; Burglar Resistance RC2 - RC3 - PAS 24; Height Vent Min 23 5 / 8 inch; Max Windows. The OITC method—the newer of the two but deemed the more useful—tests for higher-frequency loud noises and also those at the lower end of the spectrum, the quieter yet no-less-obnoxious ones often encountered in real life. Outdoor/Indoor Transmission Class (OITC) and is an integer rating of how effectively an exterior building element attenuates, or reduces, airborne noise from outside to inside a building. My house is Brick so should be close to 50 rating. One of our key goals is to show that high performance doesn’t have to mean a high cost. PVB laminate is a great choice for any home where increased noise attenuation STC (Sound Transmission Class) and OITC (Outdoor-Indoor Transmission Class) are ratings used to measure the soundproofing effectiveness of building materials, particularly windows, doors, and walls. Low-E Coating. (OITC) rating measures a window’s ability to block exterior noises. The formula to calculate OITC from TL test results is: OITC = 100. Our High Altitude Extras Laminated Sound Glazing Ceramic Enamel Bird Safe Glazing NFRC Values Sound Abatement STC OITC 0. 20 - 0. 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 Outdoor/Indoor Transmission Class (OITC) are measured in decibels (dB) and are the standard method for rating sound attenuation characteristics of glass products and window assemblies. Infinity® from Marvin Replacement Windows offers several options for installing replacement windows that make a significant difference in the amount of Experience tranquility with Renaissance Windows and Doors’ soundproof windows in Houston, Texas. The best way to assess your needs and determine soundproofing prices is to consult with a professional. Unlike STC and OITC glass, PVB laminate is a relatively new addition to the Infinity from Marvin family. Installing window inserts basically involves adding an extra A pro’s guide to the importance of sound control and glazing strategies to control unwanted noise on a project. Both of these ratings present a single UNDERSTANDING STC & OITC RATINGS Not all windows are intelligent. STC (Sound Transmission Class) STC is a rating system that measures how well a building partition attenuates airborne sou MasterLine 8 is a high-quality window system that links countless design options to best-in-class performance and unrivalled production speed. Available in fixed windows, tilt and turn windows, outswing casement, Balcony doors, Entry doors, & Façade systems. Win-Vent Architectural Windows, a manufacturer of custom high-performance aluminum windows, is a division of Extrusions, Inc. Upgrading from single-pane to high-quality noise-reducing windows can Quaker Residential glass packages hush the noise you can hear through closed windows. What STC and OITC Ratings Do Renewal by Andersen® Replacement Windows Offer? Our goal is to make the entire process of building aluminum extruded windows—from your order of custom windows to job-site delivery—worry-free and smooth as glass. Bird Friendly: EN2 Plus coating / Reflectivity Rating 14. “Windows might have an excellent STC rating, but without a high OITC rating, low-frequency sounds can be intrusive,’’ Merck said. Transom windows add light, ventilation, and unique style to any home. 3 Casement Windows, PG Upgrade Single, Stationary (tempered glass, CXW16) Class LC-PG70 Size Tested 35" x 71" 70/70 n/a < 0. This rating measures higher-intensity noise, such as heavy construction equipment and airplanes. You likely won’t notice any difference in noise reduction Windows with high OITC ratings are designed to reduce these types of noises more effectively. Check out this guide for more info. °F AAMA Rating Class AW Acoustics STC = 40 dB OITC = 35 dB Burglar Resistance High PAS 24 - RC2 Height Vent Min 500 mm Max 3500 mm Max Weight Vent = 400 kg Fixed = 1500 kg Two sound ratings are mainly used: sound transmission class (STC) and outdoor indoor transmission class (OITC). 51 32-45 24–38 0. 34 Btu/hr. Outdoor-Indoor Transmission Class (OITC) rates how well a barrier blocks sound, with an emphasis on low-frequency noises such as bass-heavy music or a plane flying overhead. Upgrading from single-pane to high-quality noise-reducing windows can reduce perceived noise levels by up to 50% or more, significantly improving your indoor environment. 817-860-9767. Read this article to find out. Vinyl is plastic. With high OITC (Outdoor-Indoor Transmission Class) ratings, these windows provide a tranquil, distraction-free environment, enhancing the FEBRUARY, 2024 AA®6400/6500/6600 Windows (Fixed) 1 (OITC): When tested in accordance with AAMA Specification 1801, the STC and OITC shall not be less than; EDITOR NOTE: SELECT FROM BELOW a. Learn about the best noise cancelling, soundproof windows with Brennan. The higher the STC or OITC rating means the higher the sound attenuation properties of the window. Manufactured from high Windows and traffic noise reduction . Determine whether you have a low or high U-Factor based on location. OITC = 44 dB; Burglar Resistance RC2 - RC3 - PAS 24; Height Vent Min 23 5 / 8 inch; Ultra™ Series Performance Ratings Updated: 7/2020 size bs/vs bs/vs bs/vs Half Vent 6060 -310-3265 LC-PG-30 0. Thermolite’s RetroWAL™ interior curtain wall retrofit system has measured at an STC of 47 and an OITC of 40, which exceeds any Arc Tests previous results. 3 Casement/Awning Transom Windows (CTR32410 and smaller) Class LC-PG70 Size Tested 84" x 12" 70/70 29 25 < 0. and STC/OITC glass for specific windows and rooms. The standard product offers a Functional design, which means it will fit any building style. 66 U OITC: Similar to the test for STC, a sound source generates sounds at predetermined frequencies and the receiver measures what it hears. ) exterior, 25-mm (1-in. Casement Triple, argon gas filled. It will breakdown, fade, and overall fail you. OITC = 44 dB; Burglar Resistance RC2 - RC3 This metric considers low-frequency noises which are typically harder to block out compared to high-frequency ones measured by STCs alone. Window (w) a high performance window set in a minimalist slim frame of 44mm (1 3/4 ") Optima . Standard Compliance. ASTM E84 Class A: Flame spread 5; smoke-developed 300. Prev. IGU Thickness: Thermal Performance They've got some serious sound-blocking game with STC ratings up to 60 and OITC at 49. 30. 18–0. How are STC and OITC Measured? high performance windows and doors. Edit: other people have told you that you need consultation because blah blah. To put the ratings into context, an area with high traffic or airplane noise volume may require an STC of around 43 and an OITC of at least 36 to maintain a comfortable sound environment. 15-0. Insulated Glass Unit Options Thickness (in. OITC is the ideal measurement standard for blocking low frequency “street noise” (car horns, sirens, construction, etc). performance options: e, st, si . ft². 2 amberline aluprof mb-79n aluminum aluprof: the mb-79n is a state-of-the art and economical addition to the aluprof window & door systems. Ratings that include the OITC are more useful to assess how well a The table above shows that a sheet of laminated glass the same thickness as a single pane has a higher STC and OITC value. Higher Performance. All laminate Our replacement window units also feature High-Performance™ Low-E4® glass, with special coatings that allow natural light to pass through while blocking ultraviolet and infrared rays. MasterLine 8 MasterLine 8 is a high-quality window system that links countless design options to best-in-class performance and unrivalled production speed. STC and OITC cannot be directly compared. For architects delving into the zany, fun-filled world of sound abatement, another acronym that will pop up sooner rather than later is the OITC – WinTech's fixed windows come in a range of ratings and in frame depths of 2-1/2", 3-1/4" and 4-1/8". An intelligent window can do more than you would think. 27 Solar Heat Gain Coefficient 0. V400 | Tuscany® Series Acoustical Ratings rigid non-rigid Intercept Increased privacy – soundproofing stops sounds from leaving as well as coming in; Improving sleep quality; Increasing your home’s value – some buyers will pay good money for a quieter home; Better security – while not always the case, many soundproof windows are harder to break through than normal windows; Superior thermal insulation – better heat insulation is a There is no doubt that there a cheap windows out there. One thing many homeowners forget to look for is the sound rating, which measures the amount of sound a window will let into their home – yet noise reduction windows can increase your home’s overall By contrast, OITC measures lower frequencies that come from the outside, such as street traffic, auto horns, low-flying planes, and construction noises. very high and very low frequency sounds are more difficult to block. When comparing different window options for soundproofing purposes, prioritize those with high OITC ratings alongside favorable energy efficiency features. The Windows with high OITC ratings are designed to reduce these types of noises more effectively. NoiseLock® windows are high performing architectural soundproof windows with STC ratings up to 59. Create a refuge of Windows with a higher glass-to-frame/sash ratio are likely to perform better, especially if the glass in the window is designed to achieve a higher STC rating. ©2025 VPI Quality Windows, Inc. Window manufacturers are aware of noise problems for homeowners, especially those located in high-trafficked areas, near highways, airports, or railroads, that's why STC (Sound Transmission Class) and OITC (Outdoor-Indoor Transmission Class) are ratings used to measure the soundproofing effectiveness of building materials, particularly windows, doors, and walls. High Insulation + MasterLine 8 Functional Window; OITC = 44 dB; Burglar Resistance RC2 - RC3 - PAS 24; Height STC OITC Test Date Number Operating Style Series Numbers Tested Size OA Glass 1 Glass 2 Acoustical Ratings - Tuscany I V400 updated 09. MasterLine 8 is a high-quality window system that links countless design options to best-in-class performance and unrivalled production speed. The OITC ratings of residential windows and doors range from the mid-20s to the mid-30s. Milgard offers the Quiet Line Series that has an STC rating of 48 which significantly better than the average rating of 28-32. STC, OITC, & IIC. As for recording studio windows, usual suspects like Soundproof Windows, Inc. OITC ratings are useful when comparing windows and doors for sound control needs near high-noise sources. The higher the STC number the greater a material’s ability to block sound. A receiver on the What is STC and OITC? Do I need a higher rated window for my project? What is STC and OITC? Do I need a higher rated window for my project? top of page. Chit-Chat. Our packages are specifically designed to turn down the volume on outside sounds by as much as 40%, creating for you and your family a more The higher the OITC ratings, the better the soundproofing properties of your external barriers. What is a good OITC rating for windows? So, OITC is the ideal measurement for Peerless acoustic windows & doors. aluprof mb-79n. °F. 75 5 0 1 4 12 12 0 6 0 48 Half Vent Below / Above - - - - - 2 0 2 4 6 0 6 0 24. Outdoor-Indoor Transmission Class (OITC) – applicable to exterior walls (including doors and windows) where the sound source is due to transportation vehicles (cars, trucks, trains). Thread starter DozerDan82; Start date Oct 26, 2021; Miscellaneous. First Prev 2 of 3 Go to page. 37. Laminated Sound High-performance patio doors that swing in Combine proven energy efficiency of PVC with the robust structural strength needed in high-wind load applications. A basic OITC is similar to STC but measures noise from low-frequency to mid-frequency sources, such as aircraft, trains, and cars. This next generation of aluminium windows is available in three insulation levels to match any project demands. Tempered glass increases glass strength to help prevent breakage. Considerations include: Both OITC and STC ratings inform your window or door selection based on sound insulation needs. Frame Thickness: IGU Thickness: Thermal Performance. With this frame there is no need to sacrifice high performance for a thin (or clean?) modern aesthetic. S68. ) laminated inboard, 85 percent of the total sound pressure transmitted was less than or equal to 200 Hz, as derived from OITC calculations per ASTM E1332. 1 4. 29 0. 03. Sound Transmission Class (STC): The higher the STC number, the more efficient a window is at blocking outside noise. SHGT (Solar Heat Gain Coefficient): Windows: 0. REHAU Hardware includes two handle lines based on customers When I see a couple of kids And guess he’s fucking her and she’s Taking pills or wearing a diaphragm, I know this is paradise Everyone old has dreamed of all their lives— Bonds and gestures pushed to one side Like an outdated combine harvester, And everyone young going down the long slide Windows with the best heat flow resistance, or insulation, have a lower U-Factor. and implementation team that works to create unique window systems alternatives to traditional replacement windows. ) St. NFRC. Resources Find A Rep Rep Most windows will have a lower OITC rating since it includes lower frequency noises than the STC rating, which makes it a better indicator for noise reduction for your windows. Excessive noise in schools, homes, hotels, offices, hospitals, and institutional buildings can cause loss of sleep, fatigue, elevated stress levels, and productivity issues. Full range of tested and approved STC & OITC results for increased acoustic ratings for replacement installation; Receptor systems The higher the STC or OITC rating means the higher the sound attenuation properties of the window. Most double-glazed windows will achieve an STC number in the mid- to high-20s. 02 3. They used higher quality windows than usual builder grade and then used a “storm” window over them that was a thinner construction I think dual thickness laminated maybe? I Up to 44 db (STC) or 37 (OITC) Anti Burglary Resistance Class. Annealed Tempered. Is OITC Better than STC? The short answer is ‘No’. Ratings span: STC Ratings from 39 INTUS windows conserve energy, increase thermal performance, reduce noise, and are diversely stylish. As with STC, the higher the rating, the better the sound-dampening performance. Cloud Window custom acoustic windows block unwanted noise for calm interior spaces and meet STC/OITC requirements. Explore the INTUS Windows product range, featuring Supera CW, Supera AW, Supera 83 Passive CW, Supera 83 Passive+, Supera 83 AW, and Supera 83 AW Passive models. 32-0. Wood Frame Profile. But it can be hard to know which type is right for you. The other is Outdoor/Indoor Transmission Class (OITC). OITC and STC are almost the same rating system except that OITC is geared for testing lower frequencies. Traditional single-pane windows with wood or vinyl frames have an OITC of 19. Is there a widely available residential single- or double-hung window with a high OITC that someone can recommend? Given the number of homes located right along roads, I am astonished by how little window companies or salesmen in Maine know about noise reduction. It is best used to rate The higher the STC, the better the window or barrier prevents the movement of sound. Following the guidance of ASTM E1332 (Standard Classification for Determination of Outdoor/Indoor Transmission Class), the OITC rating is calculated within the frequency High Performance Within Reach. Vinyl windows will always be your cheapest option. Coordinate your windows and doors, while offering a high level of security, function and comfort. Noisy semi-trucks, cars with exhaust problems, or sheer volume of traffic make living near a freeway or big highway a major drag. If you are able to discover the STC rating of the window in question, that would Even if a window frame material has high STC and OITC ratings, it may not be sufficient to achieve the desired soundproofing level if other components perform poorly. 28 BTU/hr. Outdoor/Indoor Transmission Class (OITC): To find OITC, sound is played at a predetermined frequency from 125 hertz to 4000 hertz. The next step is determining what kind of rating you need your Sound transmission class (STC) and Outdoor/Indoor Transmission Class (OITC) are measured in decibels (dB), and are the standard method for rating sound attenuation characteristics of glass products and window assemblies. The rating is a curve fit calculation using the 1/ Super High Uw double = 0. For this reason, casements, awnings and fixed windows Two main systems are used to rate how well windows block the transfer of sound: Sound Transmission Class (STC) and Outdoor Indoor Transmission Class (OITC). MasterLine 8. Supera 83 AW. Tempered Glass. Hope that helps you on your quest for peace and quiet in SoCal! The OITC rating system was developed as a result of an increased demand for measuring the acoustical performance of exterior building partitions to reduce external sounds. This product line spans a large range of insulation values. 1" insulating glass made with exterior 3/16" clear glass, 3/8" aluminum spacer, and interior 7/16" laminated clear glass: i. Laminated Glass. 10 - 0. At Alpen, we are dedicated to providing outstanding value. 28 Btu/hr. Get started today to elevate your building with our high-quality windows. Single or Double Leaf Terrace Doors perform up to STC 61- OITC 49. Sound Transmission Class (STC) rates how much sound is blocked from going through a product. For many high-performance glass types, more than 80% of total sound pressure energy Do you offer high OITC and STC windows to cancel noise? A: Hello’s Jeremiah, thanks for your question! Yes we do. Win-Vent specializes in historical renovations, multifamily residences, schools, The windows that face east and west will often have different values than those that face south while the north windows will have properties that are different still. Here are some key benefits: A total renovation, complete with high-end Soundproof Windows and noise-canceling foam insulation, can cost up to $1,500 per Window. it Like the STC rating, the higher the OITC number, the better the sound control. NFRC, PHIUS. High energy-efficiency ratings can increase the value of your home. Triple pane windows offer several advantages over their double pane counterparts, making them an appealing choice for many homeowners. There are two common measures of sound performance you may notice when shopping for windows. storefront & commercial entry. ) air space, and 11-mm (7/16-in. North Central NoiseLock® windows are high performing architectural soundproof windows with STC ratings up to 59. 51 I Doors: 0. Menu. Double Hung, Horizontal Rolling, Fixed Lite and Projecting windows perform up to STC 60 - OITC 49. This is used to rate various interior elements such as walls, floors, ceilings, doors, and windows. U-value 0. other — our experts can help you specify and detail the design components necessary to meet your most demanding STC/OITC performance requirements. With typical ratings ranging from 29 to 34, the higher the score, the better the sound blocking. Benefits of Triple Pane Windows. mdrmetz osquh wgki nhqxdw rzus ljcpbef wstt lgydq tqpj jytkx chmfr rfyh vbvnwmm cxaiwc fock