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acoustical curtains laboratory tested

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STC 17 - STC Test Specs

Sound Transmission Loss Test Report

Acoustic Curtains Hardware

Acoustic Curtains Color Chart:

Detailed Specifics of WEAL Lab Test Results

AB07-166 NRC Nova Suede French Pleat
AB07-167 NRC Nova Suede Double Sided
AB07-168 NRC Vara Velvet French Pleat
AB07-169 NRC Visa Velvet French Pleat
AB07-170 NRC Solitaire French Pleat
AB11-130 NRC Crescent Velour Pleat
AB11-131 NRC Overture Pleat

acoustical curtains laboratory tested


A STC rating describes the average number of decibels blocked by a material.

Our STC Sound Blocking curtains work due their inner linings. These linings are specialized, proprietary vinyl's made exclusively for Quiet Curtains. The face fabrics used to construct the curtains have little impact on sound blocking. See the Table below for recommended face fabrics.

STC 20 Rated
STC 17 Rated
STC 15 Rated
Lining Specs
Weight lbs/sf 0.400 0.275 0.225
Fire Rated No Yes Yes
Color Black White White
Vinyl Type MLV Laminated Laminated
STC 20 STC 17 STC 15
Curtain types
Soft Fold 3 ply X X X
Soft Fold 2 ply X X
Pleated X X
Ripplefold X X
Roman Shade X X
Roller Shade X X
STC 20 STC 17 STC 15
Recommended fabrics
Nova Suede X X X
Visa Velvet X X X
Solitaire X X X
Anti-Microbials X X

Under normal conditions, the following will serve adequately well as a general guide on the impact of variances in sound pressure levels:

  • 1 dB change is imperceptible
  • 3 dB change is just perceptible
  • 5 dB change is clearly perceptible
  • 10 dB change is substantial (halves or doubles noise heard)

Summarized WEAL Lab Test Results

  Sound Absorption Results NRC's
  Acoustic Quiet Curtains Low High
  Crescent Velour .85 NRC 1.0 NRC
  Vara Velvet .75 NRC .90 NRC
  Overture .65 NRC .80 NRC
  Visa Velvet .55 NRC .70 NRC
  Nova Suede .50 NRC .65 NRC
  Solitaire .40 NRC .65 NRC

The NRC range is a function of curtain construction. The highest NRC's are Ripplefold 220% construction. The lowest NRC's are Ripplefold 160% construction. Pleated curtains fall in the mid-range depending on fullness. Double sided soft-fold curtains perform similarly to Ripplefolds.



Acoustic Curtains

Acoustic Curtain

Our beautiful, elegant acoustical curtains and drapes are custom made for our clients’ commercial, scientific and residential use.

ANC Acoustic Curtains laboratory tested and field proven Acoustic Curtains and Acoustic Drapes protect you from outside noise, climate and light, providing maximum privacy.

Our STC 20 Quiet Curtains reduce noise by 20 decibels! Our Acoustical Curtains will reduce reverberation and echo in a large room, as well as reduce interference from outside noise.

STC 20 Quiet Curtains reduce noise by up to 20 decibels! STC 20 Acoustic Curtains use a powerful sound blocking lining to provide maximum sound protection. Acoustic Curtains can be used to cover windows, doorways and as room dividers.

Acoustic custom made curtains for most residential windows (up to 50"w x 84"h); with your choice of one of fabrics. STC 20 Acoustic Curtains can be made in any width and up to 9’ high. We can also make STC 20 Acoustic Curtains using fabric you provide.

STC 15 and STC 17 Acoustic Curtains reduce noise by up to 17 decibels! STC 15 and 17 Acoustic Curtains are especially designed for where fire certification, light weight and multiple curtain constructions are required such as schools, hotels, and other public venues. STC 15 and 17 Quiet Curtains can be made in any width and up to 18’ high. We can use your fabrics or you can choose from our wide selection of beautiful fabrics. We can also retrofit existing curtain systems. We now offer STC 17 roller shades!

Acoustic Curtains reduce reverberation and echo, as well as reduce interference from outside noise. Acoustic Curtains have tested NRC values (up to 1.00 NRC) to provide precise acoustical control and flexibility. Acoustic Curtains work due to our unique combinations of fabrics, lining and construction.

All Acoustic Curtains are custom made to our clients' specifications for size, type of construction and fabrics. We will help you choose the right curtain to achieve both the noise control and the best look for your environment and budget. We will also help you with get the right tracks and mounting hardware for your Quiet Curtains.

Both our STC and Acoustic Acoustic Curtains can be made in a wide range of constructions including pleated, Ripplefold, flat panel, Roman shades and our new STC 17 roller shades.

Additionally, in response to requests from hospitals and doctors, we have developed a special acoustical curtains laboratory tested

Acoustic Hospital Cubicle Curtains to increase patient privacy. With all constructions the result is a very substantial drapery. This contributes to the sound absorbency and dampening qualities of Acoustic Curtains.

All Acustic Curtains are hand made in the best drapery workroom in Southern California and we happily accommodate commercial and volume orders. You will be delighted with the quality of workmanship and finish.

We designed our Acoustic Curtains in response to the many requests we received for acoustic window treatments. Acoustict Curtains are particularly well suited to the following types of rooms:

acoustical curtains laboratory tested

  • Lofts
  • Condos
  • Residential & Commercial
  • Classrooms (e.g. band practice rooms, special education classrooms)
  • Auditoriums
  • Meeting/Conference rooms
  • Churches (stage, sanctuary, children's rooms)
  • Home theaters
  • Vocal booths
  • Dance studios
  • Home recording studios
  • Restaurants
  • Hotel & Motel Rooms
  • Medical offices
  • Hospitals
  • Counseling offices

Whatever the application, our Quiet Curtains are always a beautiful asset to a room. The look is classic and will always be in fashion, since elegance is never out of style.

Choose from our many tested fabrics and colors. You may also send us your fabrics with which to make Quiet Curtains for you!

Nova Suede®: The newest in fiber technology.
  • 100% pure microdenier Polyester fabric; 13 ounce weight.
  • Perfect for high traffic Home & Commercial use.
  • Developed for easy spot cleaning and washability.
  • Anti-sag, stiffening, pilling and shrink protected.
  • Engineered for abrasion resistance.
  • Lasting color fastness.
  • Available in Fire Retardant.
Nova Suede simulates suede and very easy to keep clean. Beautiful and functional with a modern look perfect for residential and commercial curtains. Effective because of the dense weave of the fabric.

Vara Velvet®
  • 100% Trevera Polyester, 18 ounce weight.
  • Washable in warm water and dry cleanable.
  • Inherently flame retardant.
  • Passes NFPA 701. (Small Scale)
  • Excellent for draperies and stage curtains.

An elegant fabric, extensively used for high end commercial environments, stage curtains and residential draperies.

Crescent Velour®
  • 100% Polyester; 20 ounce weight.
  • Washable in warm water and dry cleanable.
  • Inherently flame retardant.
  • Passes NFPA 701. (Small Scale)
  • Excellent for draperies and stage curtains.

An elegant fabric, extensively used for high end commercial environments, stage curtains and residential draperies.

  • 100% Cotton; 25 ounce weight.
  • Washable in warm water and dry cleanable
  • Passes NFPA 701 (Small Scale)
  • Excellent for draperies and stage curtains

An elegant fabric, extensively used for high end commercial environments, stage curtains and residential draperies. Our most economical heavy weight fabric.

Visa Ultra Velvet®
  • 100% Trevera Polyester; 8 ounce weight.
  • Washable in warm water and dry cleanable.
  • Inherently flame retardant.
  • Passes NFPA 701 (Small Scale).
  • Excellent for draperies and stage curtains.

Visa Velvet is lighter and more economical than Vara Velvet with a slight shimmer for an elegant look and feel.


This 16 ounce weight fabric is actually black-out lining printed on one side in a wide variety of colors This allows us to construct Quiet Curtains and drapes entirely out of black-out linings for maximum sound reduction. Available in flame retardant finishes.
Acoustic Curtains work best when hanging in loose folds. Allow for stacking space if you want the curtains to clear a window or door.

By sizing the Acoustic Curtains to completely cover side, top and bottom of the windows, you are minimizing the amount of sound that can get through to the other side. Traverse rods allow the fabric to overlap in the center and wrap around the sides to provide as much coverage as possible. When giving us measurements, provide width and length for each curtain. Add additional stacking space if you need the curtain to clear the window on either side.
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