Custom Acoustic Curtains: Reducing Noise With Style
Acoustic curtains absorb sound using dense multi-layer fabric rated by NRC coefficient. Custom noise-reduction guide by Nalia in Sherbrooke.
The older homes in Sherbrooke's Plateau Saint-Joseph have a lot of character — plaster walls, wide-plank floors, century-old windows that let the street breathe right into the living room. That's part of their charm. It's also why sound travels so freely through them, and why a busy street can feel like it's just on the other side of your curtains. Over the past few years, I've had a steady increase in requests for custom acoustic curtains — for home offices, nurseries, bedrooms near busy streets, and open-plan commercial spaces. I want to explain how these actually work, and what you can realistically expect.
How acoustic curtains actually work
An ordinary curtain reflects sound waves. An acoustic curtain absorbs them. The difference comes down to fabric density and construction.
Sound travels through vibration. When a sound wave hits a lightweight, smooth surface — a sheer panel or a thin roller blind — it bounces back and keeps going. When it hits something dense, heavy, and textured, part of its energy is dissipated as heat within the fibres. The sound doesn't disappear, but it is damped.
This is why cinemas, recording studios, and conference rooms are lined with thick, soft materials. Custom noise reducing curtains apply the same principle, adapted for residential and commercial interiors.
Understanding NRC ratings
Acoustic materials are rated with a coefficient called NRC — Noise Reduction Coefficient. It runs from 0 (total reflection) to 1 (total absorption). A well-constructed heavy triple-layer velvet panel typically achieves between 0.45 and 0.75, depending on construction and weight per square metre.
What does that mean in practice? An NRC of 0.65 means the fabric absorbs 65% of the sound energy that strikes it and reflects 35% back into the room. Across a full-height window or partition, that's a meaningful contribution.
What I always tell my clients is this: acoustic curtains reduce echo and dampen ambient sound — they don't eliminate it. A room doesn't become an anechoic chamber. But the perceived difference is real, and often more significant than people expect.
Setting expectations honestly matters here. Soundproof curtains make a genuine difference for internal reverberation, lateral sound travel, and continuous background noise like traffic or distant conversations. They don't block impact noise — a hammer, a dropped object — and they won't fully isolate a room from a neighbour's music or an outdoor heat pump.
Fabrics and construction: what makes the difference
For curtains to be genuinely acoustic, they need to be dense, heavy, and multi-layered. Here's what I work with for these projects.
Heavy cotton velvet is my primary reference fabric. At 400 g/m² and above, it has enough mass to absorb mid and high frequencies effectively. Its dense pile surface prevents vibrations from bouncing freely. A room dressed in heavy velvet is measurably quieter.
Triple-layer construction is what transforms a good fabric into a complete acoustic solution. Three elements are assembled together: the face fabric (velvet, heavy jacquard, treated linen), an interliner of acoustic felt or dense quilted cotton, and a backing fabric. This layered sandwich can also incorporate mass-loaded vinyl — a material used in commercial construction specifically to block sound transmission between spaces — for projects where maximum performance is needed.
Total weight matters as much as composition. A properly built acoustic panel weighs between 1.2 and 2.5 kg per linear metre. That weight translates directly into absorption performance.
Residential uses: where it applies
In homes, the requests I receive most often fall into a few recurring situations.
Home offices have become the most common case since hybrid work became the norm. An untreated room generates a lot of echo — it's fatiguing during extended video calls and makes it harder to concentrate. Acoustic curtains running full height on a window wall or partition make a clear difference in perceived sound quality.
Bedrooms near busy streets are a real issue in Sherbrooke's older neighbourhoods. Some stretches of King Street, Wellington, and parts of the Plateau stay active late into the evening. Custom soundproof curtains won't replace a double-glazed window — but combined with a decent window, they reduce the residual street noise that still filters through significantly.
Nurseries and children's bedrooms benefit from reduced internal echo. Infants are sensitive to sharp sounds. A room with lower reverberation is more soothing, with less bounce from voices and footsteps.
Open-plan living spaces are another interesting case. Renovations that removed walls to create open layouts often created acoustic problems in doing so: kitchen noise travels to the living room, conversations overlap. Acoustic curtains on tracks — used to temporarily define zones rather than leave the space permanently divided — help create functionally distinct areas without a permanent partition.
Commercial applications: offices, restaurants, studios
For commercial spaces, the acoustic stakes are often higher and the solutions more straightforward to justify.
Open-plan offices suffer from chronic reverberation that affects both productivity and conversational privacy. Custom acoustic curtains installed as zone dividers, along conference room walls, or on glass partitions are less invasive than permanent construction. They adapt as spaces evolve — something drywall doesn't.
Restaurants and cafés with hard surfaces — concrete, wood, exposed metal — are often uncomfortably loud. Conversation noise stacks until it becomes hard to hear the person across the table. Heavy curtains on walls, windows, and in alcoves absorb a meaningful portion of that energy, changing the perceived atmosphere without altering the overall aesthetic.
Meeting rooms and recording studios are the highest-demand applications. For these projects, I work with triple-layer panels incorporating mass-loaded vinyl, mounted on ceiling tracks that allow the absorbent surface area to be adjusted as needed. A home podcast or recording studio can be treated very effectively with this approach.
If you have a commercial project and want to explore options, I'd encourage you to get in touch so we can assess what's possible together.
The custom advantage for acoustics
For a noise reducing curtain to work, it has to cover the surface completely. Every gap — every centimetre of fabric that falls short of the wall, every inch between the panel and the floor — is a path for sound to travel through.
Off-the-shelf acoustic curtains always involve compromise: the width is never quite enough, the height stops short of the floor, the sides don't extend past the window frame. These partial openings are exactly where sound slips through.
When I take measurements for an acoustic project, I measure the space to be covered — not the window. The track is mounted at ceiling height or close to it. The width extends 20 to 25 cm past the frame on each side. The length reaches the floor with a small surplus. The result is unbroken coverage with no acoustic bypass.
It's the same logic as with blackout curtains: the fabric's performance accounts for a lot, but the installation completes the other half.
If you're dealing with noise issues in your home or workspace in Sherbrooke, it's worth talking through. Custom acoustic curtains aren't a miracle solution — but they're often the most practical one available: effective when properly made, aesthetically appropriate, and completely reversible. Book a consultation and we'll look at what can be done.