Why Acoustical Treatment for Schools Matters More Than Most People Realize
- Jason Farrington
- Apr 13
- 5 min read
Bad acoustics don't just sound unpleasant — they make your space harder to use. Here's what that actually means, and what can be done about it.
Most people don't think about acoustics until a room makes them painfully aware of the problem. A presentation where nobody can understand the speaker. A music rehearsal that sounds like chaos. A meeting room where everyone leaves exhausted from straining to hear. By the time the complaints start, the room has already been failing for a while.
Acoustics are one of the most overlooked elements of any built space — and one of the most impactful. The way a room handles sound affects how well people communicate, how comfortable they feel, and how effectively the space serves its purpose. Get it right and nobody notices. Get it wrong and the room works against everything happening inside it.
We recently completed an acoustical treatment project at Lighthouse School in Madison, WI that illustrates this clearly. It's a straightforward project with measurable results — and it's a good example of how the right treatment can turn a difficult room into a functional one.
The Case for Acoustical Treatment for Schools: What Makes Rooms Sound Bad
Sound needs somewhere to go. When it leaves a speaker's mouth, a musical instrument, or a PA system, it travels outward in all directions. In an ideal room, much of that energy is absorbed by soft surfaces — carpet, upholstered seating, acoustic panels, ceiling tiles — before it has a chance to bounce back and interfere with the direct sound.
In a room with hard surfaces, none of that absorption happens. Sound hits a bare wall and reflects back into the room. Then it hits another wall and reflects again. And again. The result is a buildup of overlapping sound energy that lingers long after the original sound has stopped — what most people describe as echo or reverb.
The harder and more reflective the surfaces, the worse the problem. Brick, concrete, drywall, glass, and metal are the most common offenders. Open ceilings with exposed metal structure are particularly problematic because they remove ome of the main surfaces that typically provides the most absorption in a finished room — the ceiling.
In a highly reverberant room, a single spoken sentence is still echoing before the next one begins. The listener's brain is processing two streams of sound simultaneously, and comprehension drops fast.
The Lighthouse School Project
A New Room With an Old Problem
When Lighthouse School, a preschool through 8th grade school in Madison, WI, completed a building expansion, the new multipurpose room had a significant sound problem. The space was designed for speech and music use, but the construction materials created exactly the conditions described above: brick walls, cement floors, and an open metal ceiling with exposed structure.
Before recommending any treatment, Production Studio 29 measured the room's reverberation time to establish a baseline. We don't guess — we measure. That measurement gives us a clear picture of how the room is currently behaving, what the target should be, and how much absorption is needed to get there.
What the Numbers Said
Reverberation time is measured in seconds and referred to as RT60 — the time it takes for sound to decay by 60 decibels after a source stops. For a room used primarily for speech, the generally accepted target is under 1.0 to 1.5 seconds. Music spaces can tolerate slightly more, but controlled reverberation is still the goal.
Lighthouse School's multipurpose room measured 2.97 seconds at 2kHz — part of the frequency range most critical for speech intelligibility. Nearly double what is considered appropriate for a speech environment. At that level, the room was actively working against its intended purpose every time it was used.
The Treatment Plan
Acoustical treatment isn't one-size-fits-all. The right solution depends on the room's size, shape, surface materials, and how it's used. For Lighthouse School, the treatment happened in two phases, targeting the two biggest sources of reflection.
First, 100 acoustical baffles were installed in the open metal ceiling. Suspended ceiling baffles are highly effective in rooms like this because they address the largest reflective surface — the ceiling — without requiring wall space or altering how the room is used. They absorb sound on both sides as it passes through, which makes them extremely efficient.
Second, 13 wall-mounted acoustical panels — each 6 feet tall, 2 feet wide, and 2 inches thick — were installed on the brick wall. Brick is one of the most reflective surfaces in any interior space, and targeted panel placement brought the remaining reverberation under control without covering the entire wall.
It's worth noting that acoustical panels don't have to be an eyesore. They can be fabric-wrapped in colors that match your space or even printed with custom artwork. Treatment that blends into a room is just as effective as treatment that stands out.
The Results
The combination of ceiling baffles and wall panels reduced the room's reverberation time by approximately 40% — from 2.97 seconds down to 1.76 seconds. Speech intelligibility improved dramatically. The room became genuinely functional for its intended uses for the first time since the expansion was completed.
The numbers tell the story, but the audio comparison tells it better. You can hear the difference between the untreated and treated room in the videos below.
Is Your Space Dealing With the Same Problem?
The conditions at Lighthouse School — a combination of hard walls, hard floors, open ceilings — are common in schools, churches, conference rooms, gymnasiums, and commercial spaces throughout Wisconsin. If your space has any of the following, acoustical treatment is worth a conversation:
Concrete or brick walls. Polished or hard-surface floors with no carpet. An open or exposed ceiling. A room that feels loud even when only a few people are in it. Complaints from staff, students, or congregation members that they can't hear clearly. A PA system that sounds muddy or unclear no matter how it's adjusted.
That last point is important. A common mistake is assuming a better sound system will fix an acoustic problem. It won't. A PA system in a poorly treated room will reproduce the room's problems more loudly — it doesn't solve them. Acoustical treatment and sound system design work together, and getting the room right first makes everything else perform better.
Think Your Space Might Have an Acoustic Problem?
We offer free consultations for acoustical treatment projects throughout Dane County and Wisconsin. No obligation — just an honest assessment of what your room needs.
Comments