Public register of test reports — acoustic curtains

Public Register of Test Reports

The term "soundproof" is not regulated. Any curtain can display it, with any decibel value. This register gathers, in one place and freely accessible, the test results that manufacturers agree to make public.

It is open to everyone, including competitors. Each entry is published as it is submitted to us, without comment, ranking, or selection.

The six pieces of information requested

  1. The laboratory that carried out the test, named.
  2. Its accreditation — ISO/IEC 17025, and the body (COFRAC, BELAC or equivalent).
  3. The test standard applied: ISO 10140-2 for attenuation, ISO 354 or ISO 11654 for absorption. The two quantities are distinct.
  4. The report number , and whether it can be provided upon request.
  5. The result : the overall index (R w with its adaptation terms, or α w and its class), and separately the maximum value with the frequency at which it was measured.
  6. The surface mass of the finished product , in kg/m² — not the weight of the fabric alone.

The register

Manufacturer Product Laboratory / accreditation Standard Report Result Mass
Cotton Silence
NOKOMIS WEBSTORE
4-layer complex Daidalos Peutz
BELAC — ISO/IEC 17025
NBN EN ISO 10140-2:2010 A-2020LAB-060-I766-44092_E
Available upon request
R w (C ; C tr ) = 14 (−1 ; −3) dB
maximum 28.2 dB at 5000 Hz
1.35 kg/m²
Cotton Silence 5-layer complex Daidalos Peutz
BELAC — ISO/IEC 17025
NBN EN ISO 10140-2:2010 A-2020LAB-060-I767-44092_E R w = 15 dB
maximum 34.2 dB
unpublished
Cotton Silence 7-layer complex Daidalos Peutz
BELAC — ISO/IEC 17025
NBN EN ISO 10140-2:2010 A-2020LAB-060-I768-44092_E R w = 16 dB
maximum 33.8 dB
unpublished

Three entries as of August 21, 2026. We open the register with ours, including the boxes we have not yet filled.

Submit an entry

Send the six pieces of information to contact@cottonsilence.com , subject line "Register". The full report is not required: the references are sufficient, as they allow anyone to request it from the manufacturer or laboratory.

Commitments. Publication as submitted, without rewording. No ranking, no rating, no editorial commentary. All submissions received are published, even if they are better than ours. Removal upon request from the sender. Correction within seven days of notification of an error, with a visible history.

What this register is not

  • This is not a comparative study. The tests presented here were conducted under different conditions and configurations. The values ​​are not directly comparable, and we are not drawing any rankings from them.
  • It is not a label. Being listed in the register does not attest to any quality: only to documentary transparency.
  • An absence proves nothing. A manufacturer not listed in this registry may very well possess tests and choose not to publish them. The registry records what is made public, nothing else.
  • We are both judge and jury. Cotton Silence is a manufacturer and is registered. That is precisely why the rules above are written, public, and enforceable.

Further Reading

Quick and Easy Cotton Silence Curtain Installation Video Tutorial

The Cotton Silence " soundproof curtain " is designed to offer a simple, quick installation that anyone can do. Thanks to our mounting system, which is engineered to optimize acoustic and thermal performance, you’ll enjoy professional-quality results without any complicated work.

Why Our Installation Is Unique

Unlike traditional curtains hung on a rod, our acoustic curtains perform best when installed on a suitable track. This system ensures optimal sealing on the sides and helps reduce sound leaks and heat loss. It's a crucial step to fully experience the sound reduction of up to 24.6 dB.

The installation is designed to be intuitive while still meeting acoustic requirements: the curtain opens at the bottom, multi-layers ventilate properly, and it's positioned optimally to create a shield against outside noise.

A Product Designed by Acoustic Experts

Cotton Silence curtains were designed by acoustics professionals with extensive experience in architectural projects. The goal was clear: to create a “true” noise-reducing curtain, one that is truly effective under real-world conditions and not just in a laboratory.

You'll find this expertise in every detail: from the choice of fibers and the design of the patented multi-layer to optimized weight, thermal performance, internal absorption, and reverb reduction.

Made in France, handcrafted quality

Every single curtain is made right here in France by professional seamstresses. This local production means you get lasting quality, perfect finishes, and careful attention to the acoustic layers.

Even though they're super effective, our curtains are still stylish, easy to use, come in lots of colors, and work great for both homes and professional spots.

Instant comfort once it's up!

Once you've got it installed, your Cotton Silence curtain works like a real sound and thermal shield. It seriously cuts down on outside noise, reduces echoes in the room, makes it feel warmer, and instantly creates a calmer, cozier space.

With our version for everyone, you get the same awesome technology that architects and pros use, right in your own home – no big renovations or complicated gear needed!

The result? Easy setup with pro-level performance!

Whether you're looking to insulate a window, a bay window, a door, or any opening, the Cotton Silence system fits right in and promises long-lasting effectiveness. Our video tutorial walks you through it step-by-step for a successful setup in just a few minutes.

If you need a hand, our team can also help you pick the right way to hang it and make sure your setup is compatible.