May we use cookies to track your activities to serve you better? We take your privacy very seriously. Please see our privacy policy for details and any questions.
Region
Customer Portal
In the world of motorized window coverings, ‘quiet’ is a popular claim. But what does it really mean? At Coulisse, we believe silence goes beyond numbers. It’s about how a system performs in real life - and how it feels and sounds in the spaces people care most about: homes, nurseries, offices, hotels and wellness environments.
“There’s no standard for measuring sound in our industry. That’s why we started looking at how to reduce the noise level in our Motionblinds motors and built our own way of testing.”
- Bas klein Tuente, Engineering manager at Coulisse
The result is Absolute Silence: a total-system approach to sound reduction, combining smarter hardware, tuned motors, and intelligent software.
You won’t see decibel numbers on our spec sheets anymore. Here’s why: The same motor tested in different environments can produce very different dB results. Wall materials, furniture, and microphone distance all influence the outcome. And since there’s no industry-wide test standard, comparing numbers between brands is rarely meaningful.
So we built our own acoustic lab - a dedicated, sound-controlled space within our engineering department in the Netherlands. It allows us to test our products (and others) under identical conditions, without interference from surrounding activity. Inside, we use a an advanced sound camera with 64 microphones, which doesn’t just measure sound - it visualizes where it originates and how it travels. It helps us isolate real problems and make real improvements.
“We test prototypes side by side with current systems. And we benchmark ourselves against other brands too. That’s how we know where to improve.”
- Bas klein Tuente, Engineering manager at Coulisse
Experience the proof in our lab video. Want to know more about the Coulisse Sound Lab? Read the full story here.
What we discovered surprised even us. In many cases, the motor wasn’t the loudest part of the system - it was the cassette.
“It’s like a guitar. The motor is like the string. But the cassette is like the body - it amplifies everything.”
- Bas klein Tuente, Engineering manager at Coulisse
To break that chain of resonance, we redesigned the system from the inside out. First, we developed the patented Silent Bracket, engineered specifically for our roller cassette systems. It uses a layer of liquid silicone rubber between two bracket components to isolate vibration before it can travel through the cassette. The bracket is compact, symmetrical, and supports motors up to 1.1 Nm. In controlled testing, it reduced system noise by up to 15 decibels compared to the standard setup.
We also addressed another overlooked noise source: the drive plug inside the tube. When tolerances between tube diameter and motor size aren’t perfectly aligned, even small gaps can cause rattling or buzzing during operation. Our new patented precision-fit drive plugs absorb these gaps and hold the motor tightly in place - minimizing vibration at the source.
With the CM-03 motor, we introduced a key refinement: frequency tuning.
“Two motors can have the same decibel level, but one can still sound louder. It depends on the character of the sound.”
- Bas klein Tuente, Engineering manager at Coulisse
High-frequency tones are often perceived as sharper and more distracting, even if they measure lower in volume. In contrast, lower-frequency sounds can register higher on a decibel scale, yet feel softer, smoother, and less intrusive. That’s why the CM-03 has been carefully tuned to emit a lower, more comfortable acoustic profile - better suited to quiet interior environments.
Silence doesn’t stop with hardware - it extends into the software that controls how the motor behaves.
Motionblinds motors now offer variable speed control, adjustable between 10 and 28 RPM, with 20 RPM as the sweet spot for quiet performance. They also include soft start and stop functionality, which eliminates abrupt mechanical movements and reduces audible clicks at the beginning and end of operation.
“It’s not just about how the motor is built - it’s how it moves. By refining speed and transitions, we’re able to create a system that feels quieter, smoother, and more elegant in everyday use.”
- Bas klein Tuente, Engineering manager at Coulisse
These features are especially valuable in smart homes and voice-controlled environments, where window coverings should move quietly, effortlessly, and without drawing attention.
It depends on the full system - not just the motor. Sound can be amplified by brackets, plugs, cassettes, and even the way components are mounted. That’s why we test entire configurations, not just isolated parts, when evaluating sound performance in our quiet motorized blinds.
Most sound comes from vibration - especially at connection points between components. Even a quiet motor can sound loud if it's mounted in a system that amplifies it. We address this by using silent brackets, suspension-drive plugs, and motors that are tuned for smoother, lower-frequency output.
Motionblinds with Absolute Silence are ideal for noise-sensitive spaces such as nurseries, bedrooms, home offices, and wellness environments. These systems are designed for minimal sound during operation - both in motor tone and system vibration.
Yes. Liquid silicone rubber is durable, flexible, and highly effective at absorbing vibration. It maintains its performance over time, making it an ideal material for reducing system noise in motorized noise-free blinds.
Yes. With the right combination of hardware, motor, and software, buzzing and clicking sounds can be nearly eliminated. Our Motionblinds motors include soft-start and soft-stop logic, and our mechanical components are designed to isolate and dampen vibration - resulting in a near-silent experience.
We benchmark Motionblinds in our own sound lab using identical test conditions and visualized sound analysis. We consistently measure clear improvements in noise level, tonal quality, and vibration control - making them one of the most quiet automated window blinds available today.
Yes. Larger blinds often require more powerful motors and larger structural components, which can increase potential vibration. That’s why Absolute Silence focuses on system-wide acoustic control - to deliver consistent quiet performance across a range of sizes and setup
Absolute Silence is more than a motor upgrade - it’s a system rethink. Our in-house research showed that most sound doesn’t just come from the motor, but from vibrations traveling through brackets, tubes and cassettes. That’s why our engineering team re-designed every detail.
In the world of motorized blinds, silence is more than a feature - it’s a promise. But proving that promise requires more than just listening. It takes science. That’s why Coulisse built its own acoustic test lab, designed exclusively to measure, visualize, and improve the sound performance of Motionblinds motors and systems.
Motionblinds, a Coulisse brand, leads the industry with cutting-edge smart motor solutions for interior shading. Our high-quality automation enhances energy efficiency, safety, and convenience across all environments.