Acoustical DOORS
What is an Acoustical Door?
An acoustical door is a complete door system (leaf, frame, perimeter seals and threshold) tested to ASTM E90 so the opening keeps up with the sound rating of the wall around it. Memtech Acoustics supplies swing, pivot and folding acoustical doors from the mid-30s STC for accordion doors up to STC 56 for swinging doors, plus sliding, lifting and rolling doors for large openings and SCIF doors for ICD 705 Sound Group 3 and 4. Most arrive factory-assembled, with seals, hardware and threshold already installed.
The Weakest Link in Soundproofing
Not even the most advanced wall systems can deliver true sound control if the door allows sound to escape. Doors often become acoustic weak points (leaky, underperforming, and overlooked) degrading the acoustic performance of adjoining walls and structures.
Memtech Acoustics supplies custom engineered soundproof doors, crafted and tested to preserve acoustic integrity of rooms and enclosures. These high-performance systems provide precision seals at critical points, ensuring that the overall solution performs as engineered.
Memtech Acoustics supplies custom engineered soundproof doors, crafted and tested to preserve acoustic integrity of rooms and enclosures. These high-performance systems provide precision seals at critical points, ensuring that the overall solution performs as engineered.
They provide:
- STC ratings from 35 to 56 to match the performance of adjacent wall assemblies (lab-tested to ASTM E90 sound transmission standards).
- Complete systems including door leaf, frame, seals, and thresholds for airtight performance.
- Architectural finish options to complement interior design without compromising performance.
- Single and double door configurations to suit conference rooms, mechanical spaces, and secure facilities.
A door only performs as well as its seals. See our sound-tested door seal systems for head and jamb gaskets, drop-down door bottoms and thresholds.
Memtech Acoustics can help your door(s) become a seamless extension of your noise control system.
System Design Features
High‑Mass Core Construction
Internal dense cores with damping layers deliver superior STC performance.
Factory-Installed Seals & Hardware
Doors come fully assembled with acoustic perimeter seals, bottom gasketing, and glazing options.
Concealed Functional Elements
Patented concealed hinges and sleek profiles maintain design integrity.
Adaptive Seal Systems
Adjustable bottom seals and magnetic gasketing compress to meet floor unevenness and air leakage challenges.
Fire-Rated Acoustic Capability
Fire-labeled configurations are available.
Rapid Turnaround & Modular Design
Select door systems are available on expedited lead times with pre-configured split frames and standard lock prep.
QuietSwing® Architectural Doors
Acoustical DOORS
QuietSwing® Alexis™
The Alexis™ is an architectural-grade swing door built around a patented concealed hinge system. No exposed hardware is visible from either face of the door, preserving the design integrity of high-end interior spaces.
At 1-3/4" door thickness, the Alexis™ is engineered to work with standard building hardware and arrives completely factory-assembled, including all seals, hardware, and a pre-installed threshold.
Its split-frame assembly allows installation into existing openings without requiring a full frame replacement, making it equally well-suited for new construction and retrofits. ADA compliant with a single continuous compression seal and minimal opening force.
At 1-3/4" door thickness, the Alexis™ is engineered to work with standard building hardware and arrives completely factory-assembled, including all seals, hardware, and a pre-installed threshold.
Its split-frame assembly allows installation into existing openings without requiring a full frame replacement, making it equally well-suited for new construction and retrofits. ADA compliant with a single continuous compression seal and minimal opening force.
- Rated STC 51, per the manufacturer's published rating
- 3-axis adjustable concealed hinge
- Low-distortion vision lite system available
- Composite silicone polymer compression seal
Best For: Corporate offices, hospitality spaces, executive suites, cultural venues, and any environment where architectural aesthetics and acoustic performance must coexist without compromise.
Acoustical DOORS
QuietFold® Bi-Parting Acoustic Door
The QuietFold® is engineered for large openings that must close fully for acoustic isolation but need to open wide for access, traffic flow, or flexible space reconfiguration.
Multi-panel folding leaves (available in four or six-hinge configurations) stack to one or both sides of the opening, with a continuous magnetic compression seal system providing uniform acoustic closure across the full span.
Memtech Acoustics specifies the QuietFold® in STC 50, 52, and 54 configurations, with panel thickness and construction selected to match the project's performance target. A multi-point locking system distributed across the sliding track provides enhanced security alongside acoustic performance.
Multi-panel folding leaves (available in four or six-hinge configurations) stack to one or both sides of the opening, with a continuous magnetic compression seal system providing uniform acoustic closure across the full span.
Memtech Acoustics specifies the QuietFold® in STC 50, 52, and 54 configurations, with panel thickness and construction selected to match the project's performance target. A multi-point locking system distributed across the sliding track provides enhanced security alongside acoustic performance.
- STC 50, 52, and 54 performance levels, tested to ASTM E90
- Covers openings from 12 to 40 feet
- Four or six-hinge leaf configurations; folds to one or both sides
- 2-1/2" panels (STC 50/52) or 3-1/2" panels (STC 54)
- Multi-point locking system across sliding track
- Dual magnetic seals; 14-gauge galvanneal steel with non-combustible acoustic fill
- Standard or custom glazing available
Best For: Convention centers, multipurpose halls, concert venues, churches, schools, auditoriums, production spaces, and government secure areas requiring large-span acoustic separation with flexible access.
Acoustical DOORS
QuietPivot™ Acoustic Door
The QuietPivot™ uses a low-friction center pivot mechanism in place of traditional hinges, offering a swing geometry suited to environments where standard hinge-side clearance is limited or where the architectural configuration doesn't accommodate a conventional swing door.
Rated at STC 45, each QuietPivot™ features solid 14-gauge galvanneal steel construction, a non-combustible acoustic fill, and a dual magnetic seal system for consistent perimeter closure.
Memtech Acoustics specifies the QuietPivot™ as a cost-effective alternative to operable partitions where full partition flexibility isn't required but reliable acoustic separation is.
Rated at STC 45, each QuietPivot™ features solid 14-gauge galvanneal steel construction, a non-combustible acoustic fill, and a dual magnetic seal system for consistent perimeter closure.
Memtech Acoustics specifies the QuietPivot™ as a cost-effective alternative to operable partitions where full partition flexibility isn't required but reliable acoustic separation is.
- STC 45, tested to ASTM E90
- Center pivot mechanism; no hinge-side swing clearance required
- 14-gauge galvanneal A-60 steel with non-combustible acoustic fill
- Dual magnetic seal system for airtight perimeter closure
- Factory-assembled; hardware, seals, and glazing pre-installed
- Available in single and double-leaf configurations
Best For: Theaters, performing arts centers, broadcast studios, university facilities, museums, and spaces where flexible acoustic separation is needed but full operable partition systems aren't practical or necessary.
Acoustical DOORS
QuietSlide® Horizontal Sliding Door
The QuietSlide® delivers acoustic-rated performance in a power-operated horizontal sliding format for when swing or fold geometry isn't viable due to space constraints, traffic patterns, or operational requirements.
Available in single-slide or bi-parting configurations, each door is custom-fabricated from heavy-duty galvanized A-60 galvanneal steel with internal stiffeners and a non-combustible acoustic fill.
Memtech Acoustics specifies the QuietSlide® for large industrial and infrastructure openings where powered operation, heavy-duty construction, and reliable acoustic performance must all be met in a single assembly. The motor and belt system arrive factory pre-assembled and tested, with the full unit crated for efficient transport and installation.
Available in single-slide or bi-parting configurations, each door is custom-fabricated from heavy-duty galvanized A-60 galvanneal steel with internal stiffeners and a non-combustible acoustic fill.
Memtech Acoustics specifies the QuietSlide® for large industrial and infrastructure openings where powered operation, heavy-duty construction, and reliable acoustic performance must all be met in a single assembly. The motor and belt system arrive factory pre-assembled and tested, with the full unit crated for efficient transport and installation.
- STC 51, tested by an independent laboratory. Motorized or manual; single or bi-parting; openings from about 10 × 10 ft to 20 × 30 ft
- Custom-fabricated; solid 14-gauge galvanneal steel with internal stiffeners
- Non-combustible mineral wool or fiberglass acoustic fill
- Ships crated for efficient transport and installation
- Standard or custom glazing; variety of hardware options available
Best For: Large industrial openings, stage access doors, test cell entries, airport facilities, and any application where swing or fold clearance is unavailable and powered operation is preferred or required.
Acoustical DOORS
QuietSwing® Industrial Heavy-Duty Door
Where standard architectural doors reach their limits, the QuietSwing® Industrial is what Memtech Acoustics specifies. Built for continuous-duty operation in demanding acoustic and physical environments, these heavy-duty swing doors feature reinforced construction, high-mass acoustic cores, and multi-layer gasketing designed to maintain performance under sustained vibration, airflow pressure, and heavy operational cycling.
Custom sizing, blast resistance options, and high-cycle hardware are available for mission-critical applications.
Custom sizing, blast resistance options, and high-cycle hardware are available for mission-critical applications.
- STC 50+, depending on mass, construction, and seal configuration
- Heavy-gauge steel with internal acoustic cores engineered to block airborne sound transmission while keeping overall weight manageable
- Available in single-swing or paired double-leaf designs; personnel-size doors up to 4′ × 10′ and oversized doors for large-scale openings such as stage access or industrial test cells
- Precision compression seals, drop bottoms, and acoustically rated frames that minimize flanking paths
Best For: Engine and turbine test cells, power generation facilities, anechoic chambers, acoustic labs, industrial manufacturing plants, and mission-critical environments where doors must perform reliably under demanding physical and acoustic loads.
Acoustical DOORS
QuietGuard™ SCIF Doors
The QuietGuard™ is the door Memtech Acoustics specifies when a project must satisfy the acoustic requirements of ICD/ICS 705, the governing standard for Sensitive Compartmented Information Facilities.
Designed to meet Sound Group 3 and Sound Group 4 performance classifications, these doors go beyond standard acoustic ratings to address the speech privacy thresholds mandated for classified government and defense environments.
Construction combines high-mass steel skins, multi-layer acoustic cores, and precision perimeter sealing systems engineered to minimize the flanking paths that would otherwise compromise a facility's acoustic and security integrity. Available in configurations suited to both new SCIF construction and renovation of existing secure spaces.
Designed to meet Sound Group 3 and Sound Group 4 performance classifications, these doors go beyond standard acoustic ratings to address the speech privacy thresholds mandated for classified government and defense environments.
Construction combines high-mass steel skins, multi-layer acoustic cores, and precision perimeter sealing systems engineered to minimize the flanking paths that would otherwise compromise a facility's acoustic and security integrity. Available in configurations suited to both new SCIF construction and renovation of existing secure spaces.
- High-mass steel construction with multi-layer acoustic core
- Precision perimeter sealing to minimize flanking paths in classified environments
- Suitable for new construction and renovation of existing secure facilities
- Compatible with applicable physical security hardware requirements
- Available for U.S. government, defense, and intelligence community projects
Best For: SCIFs, Sensitive Compartmented Information Facilities, U.S. military installations, intelligence community facilities, federal government secure spaces, and any project governed by ICD 705 acoustic compliance requirements.
Acoustical DOORS
Accordion Acoustical Doors
For spaces that demand flexibility, such as large openings that must close securely for acoustic isolation, accordion-style acoustical doors are an effective solution.
- Typically STC mid-30s to mid-40s, depending on configuration and sealing system
- Multi-panel systems with acoustical cores, precision hinges, and continuous magnetic compression seals to ensure uniform closure
- Panels fold or slide to one or both sides for quick reconfiguration of space; oversized options available for any commercial or industrial setting
Applications:
- Convention centers and multipurpose rooms where partitions must provide both flexibility and acoustic control
- Studios, rehearsal rooms, and auditoriums requiring occasional large openings without compromising privacy
- Government secure areas and SCIFs where both access and classified speech privacy are mandatory
- Industrial test facilities requiring large-scale access combined with noise containment
Acoustical DOORS
Specialty Industrial Doors
For mission-critical environments where standard assemblies aren’t enough, Memtech Acoustics engineers custom industrial door systems built to meet the highest acoustic, environmental, and structural demands.
- Custom-rated, typically STC 50+, depending on mass, construction, and seal design.
- Heavy-duty acoustic cores reinforced for durability under demanding operational loads. Options for blast resistance, oversized widths/heights, and continuous use cycles.
- Multi-layer gasketing, high-mass cores, and resilient seals designed to withstand vibration, airflow pressure, and heavy traffic.
Applications:
- Test cells for engines, turbines, and machinery.
- Power generation facilities where high sound pressure levels must be controlled.
- Industrial plants requiring worker protection from hazardous noise exposure.
- Anechoic chambers and acoustic labs requiring maximum noise isolation.
Acoustical DOORS
Sliding, Lifting, Folding and Rolling Acoustic Doors
When an opening is wider than the 12 feet of a typical pair of swing doors, the right door depends on the clear wall space beside and above the opening.
How to Choose:
- Folding (bi-parting): Panels stack to one or both sides, with no clear wall space needed beside or above the opening. Bi-fold up to 20 feet wide, tri-fold 20 to 40 feet. STC 50, 52 or 54.
- Sliding: Needs clear wall space beside the opening that is wider than the opening; a bi-parting slider splits it between both sides. Typical openings from 10 × 10 ft to 20 × 30 ft, motorized with push-button controls. STC 51.
- Lifting: Needs clear wall space above the opening that is taller than the opening, plus structural towers on each side. Typical openings from 10 × 10 ft to 20 × 20 ft, motorized. Rating confirmed per model when quoted.
- Rolling: For large openings with room for the door to coil above. Rating confirmed per model when quoted.
Send us the opening size and the clear space beside and above it, and we will recommend the door type.
Product Design Highlights
Every acoustical door system we provide is engineered, tested, and rated to deliver reliable sound isolation.
STC Ratings
Doors are tested in accordance with ASTM E90 for sound transmission loss, with options ranging from STC 45 for standard architectural swing doors to STC 56 for heavy-duty metal and specialty assemblies. Wood veneer faces are available from STC 45 to STC 56.
Complete Door Assemblies
All doors are supplied with acoustically rated frames, perimeter seals, and drop bottoms or thresholds to ensure airtight closure and consistent results.
Construction Integrity
Steel construction with acoustical cores, in powder-coat or wood veneer finishes, designed for high-mass, low-resonance performance while maintaining durability and ease of operation.
Size & Configuration Flexibility
Architectural swing doors up to 5 × 12 ft single and 12 × 12 ft pairs; industrial swing doors up to 8 × 16 ft single and 16 × 16 ft pairs. Sliding, folding and lifting doors cover wider openings.
Fire & Safety Compliance
Acoustical doors can be specified in fire-labeled configurations while maintaining acoustic performance, meeting both safety and code requirements.
Sealing Systems
Precision magnetic compression seals, automatic drop bottoms, and multi-point gasketing provide uniform contact to block sound leaks and flanking paths.
Environmental & Durability Standards
Built for long-term performance under heavy use, with options for low-VOC finishes and systems that integrate into sustainable building designs.
Comparing Acoustical Door Types
Memtech Acoustics confirms the final rating, size and hardware for each opening when the door is quoted.
QuietSwing® Architectural
QuietSwing® Alexis™
QuietSwing® EZ Open™
Door type
Single or double-leaf swing door
Door type
Concealed-hinge swing door, 1-3/4" thick
Door type
Low-force swing door, under 3 lbs to open
Rating
STC 45 to 56
Rating
STC 51
Rating
STC 45 to 51
Typical use
Conference rooms, offices, studios and healthcare spaces; personnel sizes up to 4′ × 10′ single and 8′ × 10′ pairs
Typical use
Corporate offices, hospitality spaces and retrofits into existing openings
Typical use
High-traffic and ADA-sensitive spaces
QuietSwing® Industrial
QuietPivot™
QuietGuard™ SCIF
Door type
Heavy-duty swing door
Door type
Center-pivot door
Door type
High-mass steel secure door
Rating
STC 50+
Rating
STC 45
Rating
ICD/ICS 705 Sound Group 3 or 4
Typical use
Engine and turbine test cells and power generation facilities
Typical use
Theaters, broadcast studios and spaces without hinge-side clearance
Typical use
SCIFs and secure government spaces, new or renovated
QuietFold® Bi-Parting
QuietSlide®
Accordion Doors
Door type
Multi-panel folding door
Door type
Motorized or manual horizontal sliding door
Door type
Multi-panel folding or sliding door
Rating
STC 50, 52 or 54
Rating
STC 51
Rating
STC mid-30s to mid-40s
Typical use
Openings from 12 to 40 ft in convention centers, auditoriums and multipurpose halls
Typical use
Openings from about 10 × 10 ft up to 20 × 30 ft, such as stage access and test cell entries
Typical use
Large openings in convention centers and multipurpose rooms
Acoustical DOORS
When a Better Door Will Not Help
A door is one element of a partition. A high-STC door in a wall rated well below it, or beside unsealed ducts, gaps or a lightweight ceiling, will not deliver its rating in the field, because sound takes the weaker path. Memtech Acoustics matches the door to the adjacent wall assembly and checks those flanking paths before recommending a rating.
Common Applications
Acoustical doors are essential wherever privacy, compliance, and noise isolation matter.
- Healthcare Facilities
Support speech privacy in exam rooms, consultation offices, and nurse stations. - Corporate & Education
Ensure speech privacy for conference rooms, classrooms, lecture halls, and executive offices, minimizing disruptive noise transfer between adjacent spaces. - Government & Security
Support classified discussions, SCIFs (Sensitive Compartmented Information Facilities), and command centers with doors that meet both acoustic and security requirements. - Industrial & Manufacturing
Reduce hazardous noise exposure in test cells, power generation facilities, and mechanical rooms, supporting safer work environments and OSHA compliance. - Performing Arts & Media
Deliver acoustic integrity in recording studios, broadcast rooms, theaters, and performance halls, where even slight sound leaks can compromise audio quality. - Hospitality & Public Venues
Enhance guest comfort and event quality by isolating conference centers, meeting rooms, and convention halls from external noise sources.
Applications
Industrial & Manufacturing
Test cell and mechanical room entries
Warehousing & Fulfillment
Large openings that need a sliding or folding door
Testing Labs
Anechoic chamber and acoustic lab entries
Commercial Offices
Conference rooms and executive offices
Government & Public Sector
SCIFs and secure meeting rooms
Recording Studios
Studio and control room doors
Technical Data &
Product Literature
Can't find what you need?
Contact Us or call us at (248) 289-1123 during our normal business hours (Mon-Fri, 8:00AM to 5:00PM ET) to speak directly with a noise control expert.
QuietSwing®
QuietSwing® STC 45 Door Details Sheet
QuietSwing® STC 46 Door Details Sheet
QuietSwing® STC 50 Door Details Sheet
QuietSwing® STC 51 Door Details Sheet
QuietSwing® STC 52 Door Details Sheet
QuietSwing® STC 54 Door Details Sheet
QuietSwing® STC 56 Door Details Sheet
QuietPivot®
QuietPivot® Door Drawings
QuietFold®
QuietFold® Bi-Parting Door Drawings
Support Beyond the Product
Installation coordinated through qualified subcontractors in select regions
Engineering consultation to ensure proper material selection
Custom sizing and integration with other Memtech Acoustics systems
Replacement panels and parts available for future reconfiguration
Frequently Asked Questions (FAQs)
Why is the door often the weakest point in a soundproofed room or enclosure?
A wall assembly is only as effective as its least-performing component. Gaps at the perimeter, insufficient door mass, and inadequate sealing at the threshold are the most common failure points. Acoustical doors are engineered as complete systems (door leaf, frame, perimeter seals, and threshold) to minimize these flanking paths and match the performance of the adjacent wall assembly.
What STC ratings are available for acoustical doors, and how do I know which one I need?
Memtech Acoustics supplies acoustical doors from STC 35 to STC 56, tested to ASTM E90. As a general benchmark: STC 41 to 45 suits conference rooms and classrooms that need good speech privacy; STC 45 to 50 suits recording studios, broadcast rooms and healthcare spaces with strict privacy requirements; STC 50 to 56 is specified for industrial test cells, power generation, SCIFs and high sound levels. The right target depends on the source level, the reduction needed and the rating of the adjacent wall.
What types of acoustical doors does Memtech Acoustics supply?
Memtech Acoustics supplies QuietSwing® Architectural swing doors (STC 45 to 56), the QuietSwing® Alexis™ concealed-hinge door (STC 51), QuietSwing® EZ Open™ low-force doors (STC 45 to 51), the QuietPivot™ center-pivot door (STC 45), QuietFold® bi-parting folding doors for 12 to 40 ft openings (STC 50, 52 and 54), QuietSlide® sliding doors (STC 51), lifting and rolling doors for large openings, QuietSwing® Industrial heavy-duty doors (STC 50+), accordion doors and QuietGuard™ SCIF doors.
What is the QuietSwing® Alexis™ door, and when should I specify it?
The Alexis™ is an architectural-grade swing door featuring a patented concealed hinge design. No exposed hardware is visible from either side of the door, preserving the clean aesthetic of high-end interiors. At 1-3/4" door thickness, it works with standard building hardware and arrives factory-assembled with all hardware, seals, and a pre-installed threshold. The split-frame design allows it to be installed into existing openings, making it well-suited for commercial office retrofits, corporate headquarters, hospitality spaces, and any environment where aesthetics and acoustic performance need to coexist.
What is the difference between magnetic seals and compression seals on acoustical doors?
Both seal systems serve the same function to create an airtight perimeter closure when the door is closed, but they work differently. Magnetic seals attract and compress automatically as the door closes, requiring no manual adjustment and providing consistent contact around the full door perimeter. Compression seals use mechanical force to create the seal.
The QuietSwing® EZ Open™ system combines both: a custom compression seal working in tandem with the magnetic seal to reduce the force needed to open the door to under 3 lbs, which is particularly valuable in high-traffic or ADA-sensitive environments.
The QuietSwing® EZ Open™ system combines both: a custom compression seal working in tandem with the magnetic seal to reduce the force needed to open the door to under 3 lbs, which is particularly valuable in high-traffic or ADA-sensitive environments.
Can acoustical doors be specified with fire ratings?
Yes. Acoustical doors can be specified in fire-labeled configurations while maintaining acoustic performance, meeting both safety and building code requirements. This is commonly required in healthcare, government, industrial, and educational occupancies where both acoustic separation and fire-rated construction are mandated by code.
What door system is appropriate for a SCIF or secure government facility?
SCIFs need doors that meet the acoustic requirements of ICD/ICS 705, which sets Sound Group 3 or Sound Group 4 performance depending on the facility. Memtech Acoustics specifies QuietGuard™ SCIF doors for these projects: high-mass steel skins, multi-layer acoustic cores and precision perimeter seals, available for new SCIF construction and for renovation of existing secure spaces.
Do acoustical doors come factory pre-assembled, or are they field-assembled on site?
Most door systems arrive at the job site completely factory-assembled, including all hardware, seals, glazing, and threshold. This significantly reduces installation time, limits field fit-up variables that can compromise acoustic performance, and ensures the door performs as tested. The QuietSlide® power-sliding system ships with the motor and belt system pre-assembled and crated for transport.
Can Memtech Acoustics help me specify the right acoustical door for my project?
Yes. Memtech Acoustics provides engineering consultation for door selection based on your STC target, opening size, fire rating requirements, application environment and aesthetic criteria. Installation is coordinated through qualified subcontractors in select regions. CAD drawings are included with custom orders, and LEED documentation is available upon request.
Do you supply rolling, lifting or sliding acoustic doors for large openings?
Yes. For openings too wide for a swing door, Memtech Acoustics supplies sliding, vertical lifting and rolling acoustic doors. QuietSlide® sliding doors are rated STC 51 and suit openings from about 10 x 10 ft up to 20 x 30 ft. Ratings for lifting and rolling doors depend on the model and are confirmed when the door is quoted.
How long does it take to get an acoustical door?
Typical lead time is 2 to 3 weeks for custom submittal drawings, then 8 to 12 weeks for fabrication, depending on door type, size and configuration. Memtech Acoustics confirms the schedule for each project. Most doors ship factory-assembled with seals, hardware and threshold installed, and installation is coordinated through qualified subcontractors in select regions.
When will an acoustical door not solve the problem?
When the wall or another path leaks more sound than the door. A door is one element of a partition, so a high-STC door in a wall rated well below it, or beside unsealed ducts, gaps or a lightweight ceiling, will not deliver its rating in the field. Memtech Acoustics matches the door to the adjacent wall assembly and checks those flanking paths before recommending a rating.
Let’s Engineer the Right Solution, Together.
Let's Get Started. Contact Us.
Talk to our experts. We’ll assess your needs and recommend a solution that works for your project.
