What Difference Do Voids Behind PET Acoustic Panels Make?
Category
Wood acoustic panels
Discover how adding a simple void behind your PET acoustic panels or wood acoustic wall panels can dramatically improve sound absorption—without changing your product. Learn why installation matters as much as material.
When designing a productive, comfortable workspace—whether it’s a modern open office, a focused meeting room, or a hybrid collaboration zone—acoustics often take a back seat. Yet, it’s one of the first things people feel. A room that echoes with chatter and keyboard clatter feels chaotic. One that absorbs sound feels calm, professional, and intentional.
At Seninpanel, as a leading manufacturer of high-performance wood acoustic panels and PET acoustic panels, we’ve spent years refining not just what our panels are made of—but how they’re installed. And here’s a game-changing insight: the space behind your acoustic wall panels matters just as much as the panels themselves.
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The Power of the Void: Small Gap, Big Impact
Let’s look at real-world data from our in-house testing:
- A standard 12mm PET wall panel mounted directly on the wall achieves an NRC (Noise Reduction Coefficient) of 0.40—decent, but not exceptional.
- Add just 25mm of empty space (a void) behind the same panel, and the NRC jumps to 0.60—a 50% improvement with zero material change.
- Now, fill that void with 50mm of acoustic wadding, and you reach an NRC of 0.95—Class A acoustic performance, ideal for critical listening or speech clarity.
The same principle applies to thicker panels:
- A 24mm wood acoustic panel flat on the wall: NRC 0.65
- With a 100mm void: NRC 0.90
- With added acoustic wadding: NRC 1.0—the highest possible rating.
This isn’t magic—it’s physics. And it’s a strategy you can leverage immediately.
Why Does a Void Work So Well?
Sound waves don’t just hit a surface and stop. When a panel is flush against a solid wall, low- and mid-frequency sounds reflect back into the room because there’s nowhere for the energy to dissipate.
But introduce a void behind your acoustic wall tiles, and you create a resonant cavity. Sound waves enter the porous panel, travel into the air gap, bounce around, lose energy through friction, and—when combined with absorptive backing like acoustic wadding—are effectively “trapped.”
Think of it like this:
- Panel only = a single layer of defense
- Panel + void = a sound-absorbing chamber
- Panel + void + wadding = a high-efficiency acoustic trap
This is especially effective for PET acoustic panels, which are already highly porous and sustainable (made from recycled plastic bottles), but truly shine when installed with strategic spacing.
Practical Tips for Architects, Designers & Facility Managers
You don’t need to replace your current acoustic boards for walls—just rethink how you mount them.
For open offices: Use 25–50mm voids behind acoustic PET panels to reduce ambient noise and improve speech privacy. For conference rooms: Combine wood acoustic panels with 100mm voids and mineral wool backing for crystal-clear audio during calls. For cost efficiency: Achieve Class A performance without upgrading to thicker or more expensive materials—just optimize installation.
At Seninpanel, we offer custom mounting systems and technical support to help you implement these strategies seamlessly. Our acoustic wall panels are designed for both aesthetic elegance and functional flexibility—whether you’re using PET, wood, or hybrid systems.
Final Thought: Installation Is Part of the Product
Too often, acoustic performance is judged solely by material specs. But as our tests prove, how you install your acoustic wall tiles is half the battle.
A small void behind your PET wall panels isn’t just an installation detail—it’s a performance multiplier. And when you’re working with a trusted manufacturer like Seninpanel, you get not just premium acoustic PET panels, but expert guidance to maximize their potential.
Ready to transform your space?
Contact Seninpanel today for samples, technical data, and custom void-based installation recommendations.
Where Can You Use wood acoustic panels？
Bedrooms
Turn your bedroom into a serene sanctuary using acoustic SlatWall panels.These panels have a backing made of recycled felt that helps absorb sound, creating a quieter environment perfect for relaxing. If you want a modern headboard look, go for half-height panels. For a full display of the wood’s natural textures and grain patterns, choose the full-height option.
Living Rooms and Cinema Rooms
Add warmth and elegance to your home with the classic charm of SlatWall panels. The natural wood finish promotes relaxation by introducing texture and depth, offering a welcoming and modern appearance. These panels are perfect for modern media walls and can also enhance sound quality.
Hallways and Stairs
Create a strong first impression with SlatWall panels in your hallways and staircases. The slatted design offers texture and personality to these areas while keeping a sleek, contemporary look. Choose half-height panels for a fresh take on traditional wainscoting. Go for Premium Oiled finishes to boost durability and resist stains, perfect for high-traffic zones.
Ceilings
Enhance the fifth wall of your room by extending SlatWall panels to the ceiling, creating a dramatic design feature. The slatted pattern adds depth, gives the impression of a longer space, and enhances sound quality, fostering a more open and tranquil atmosphere in any room.