The "Zoom Room" Echo: Perfecting Acoustics for Video Conferencing Spaces
Since the permanent shift to hybrid work, the layout of the modern office has changed. The massive, 20-person boardroom is being replaced by clusters of small, 2-to-4-person "huddle spaces" designed specifically for Microsoft Teams and Zoom calls. Visually, these rooms look great—often featuring sleek glass partitions, hard flooring, and a large monitor mounted to painted drywall. However, the moment an employee joins a call, the person on the other end is hit with a barrage of tinny, hollow, and fatiguing audio.
IT managers often spend thousands of pounds upgrading microphones and software algorithms to fix the issue, but the software isn't the problem. The architecture is. Here is why small meeting rooms sound so bad, and how you can fix the dreaded "Zoom room echo" using smart, targeted acoustic design.
The Physics of "Flutter Echo"
To fix the audio, we first have to understand what the microphone is actually picking up.
When you speak in a small, untreated room, the sound waves leave your mouth and hit the hard drywall or glass in front of you. Because the room is small, those waves bounce back incredibly quickly. They then hit the wall behind you, bounce forward again, and repeat this cycle hundreds of times a second.
This rapid, ping-pong effect between two parallel hard surfaces is called a flutter echo.
While the human brain is reasonably good at filtering this out in person, a highly sensitive video conferencing microphone is not. It picks up both your direct voice and the dozens of micro-echoes bouncing off the walls. This is what causes the audio on the other end to sound garbled, distant, and exhausting to listen to.
The Big Misconception: Soundproofing vs. Sound Absorption
When facility managers realize a room sounds terrible, they often search for ways to "soundproof the meeting room." But this is a critical misunderstanding of acoustic physics.
Soundproofing (Sound isolation): This is stopping noise from leaving the room and bothering the people outside. This requires heavy, dense mass (like lead or thick drywall) and airtight construction.
Sound Absorption: This is stopping the echo inside the room to make the audio clear for the people on the call.
If your goal is to make your video calls sound professional and crisp, you don't need soundproofing. You need sound absorption. You need to introduce soft, porous materials that catch the sound waves and stop them from bouncing back into the microphone.
How to Acoustically Treat a Video Conferencing Room
Treating a huddle room is highly effective, relatively inexpensive, and doesn't require covering every inch of the wall. By strategically placing GB Acoustics PetFelt panels, you can eliminate flutter echo instantly.
Here are the three golden rules for treating a Zoom room:
1. Treat Adjacent, Not Just Opposite Walls
You do not need to cover the entire room in foam. To kill a flutter echo, you simply need to break the parallel bounce. If you put acoustic panels on the Left Wall, leave the Right Wall bare. Instead, put the next set of panels on the Back Wall. By treating two adjacent (touching) walls, you stop sound from bouncing back and forth on both the X and Y axes of the room.
2. Target the "Speech Zone"
Sound waves are directional. When an employee is sitting at a desk talking into a monitor, the majority of the sound energy is directed straight ahead at head-height.
Don't worry about placing panels near the floor or high up by the ceiling.
Focus your PetFelt Wall Panels exactly where the sound is hitting: at seated head-height, wrapping around the desk and behind the monitor where possible.
3. Utilize the Ceiling for Glass Rooms
What if the room is a "Glass Box" with no solid walls available for panels? If the walls are entirely glass and a screen, the sound will bounce violently between the hard surfaces. In this scenario, the ceiling becomes your most valuable acoustic real estate. Suspending a PetFelt Acoustic Ceiling Raft directly over the meeting table will catch the vertical echo, dramatically improving microphone clarity without blocking the architectural glass.
The GB Acoustics Solution for Huddle Rooms
Upgrading the acoustics of your meeting spaces shouldn't mean sacrificing the office aesthetic. Our Direct-Fix Acoustic Wall Panels (available in 9mm, 12mm, and 24mm) are the perfect solution for Teams and Zoom rooms. Manufactured from minimum 75% recycled plastic bottles, they can be customized with V-groove patterns, bevelled edges, or even printed with your company logo to match your corporate branding. They adhere directly to standard drywall, offering an instant, mess-free installation that immediately elevates the quality of your hybrid meetings.