Acoustic treatment for schools and universities

Classrooms are typically built with hard surfaces: painted block walls, vinyl or tile floors, and hard ceilings. Every surface reflects sound. The teacher's voice hits the back wall and bounces back, arriving a fraction of a second after the direct sound. In a room with 0.8 to 1.0 second RT60, that creates a blurring effect where words overlap with their own reflections.

The back rows get it worst. By the time the teacher voice reaches the back of the room, it is competing with reflections from every surface in between. A student in row six is hearing something noticeably less clear than a student in row one, and neither of them can usually explain why.

Add 25 students talking in group work and the noise level climbs further. The teacher raises their voice to compensate, which adds more sound energy to an already reflective room, and the cycle continues.

Ceiling treatment does most of the work in classrooms, just as it does in offices. The ceiling is the largest untreated surface and usually the easiest one to access. Comfy Tile panels in a ceiling grid, or suspended SOF Baffles for rooms with exposed ceilings, bring RT60 down significantly.

Wall panels on the back wall and one side wall usually handle the rest. For classrooms, the Comfy fabric panel at 40 mm or 50 mm thickness is what we recommend most. The fabric options fit school interiors well, and the panels are robust enough for student environments. The Niche wooden panels work well in premium school projects where the architect wants a timber look.

For lecture halls and larger teaching spaces, the acoustic requirement changes because the room volume increases. Ceiling baffles or clouds cover the large overhead area, and wall treatment on the perimeter handles lateral reflections. The Diverse panels are often useful here because the groove pattern contributes some diffusion alongside absorption.

School auditoriums need a longer RT60 than classrooms, usually somewhere around 0.8 to 1.2 seconds depending on whether the space is primarily for speech or for music as well. A multi-purpose auditorium that hosts both assembly talks and school concerts is the hardest one to get right because the two uses want different reverberation characteristics.

The usual approach is to design for speech clarity and accept that music performance will be slightly drier than ideal. The reverse, designing for music and accepting muddy speech, is worse because assemblies and presentations happen more often than concerts in most schools.

Our project portfolio already includes school and university auditoriums across the GCC and India. Products typically used are Niche or Perf wooden panels for walls, Comfy Tile or Contour panels for ceiling treatment, and acoustic doors for sound isolation between the auditorium and adjacent corridors.

If you are working on a school project, the acoustic consultant is often referencing ANSI S12.60, which caps classroom RT60 at 0.6 seconds for rooms under 283 cubic meters. The WELL Building Standard also pushes low reverberation targets for conference-type and administrative spaces, which covers staff rooms and school offices as well.

Indian building codes do not currently impose a single mandatory classroom acoustic standard in the same way, but premium school projects in India and the GCC are often specified to ANSI S12.60 or a local equivalent anyway. Our products have tested NRC ratings, and the team can provide absorption-coefficient data and supporting documentation for tenders and compliance review.