This project was an acoustic renovation for a multi-purpose auditorium in a K-12 school. The original space had long reverberation time, especially in the mid-low frequency band, leading to muffled speech and uneven sound distribution. Students seated in the back rows often struggled to hear lectures clearly, and stage performances suffered from poor sound quality.
The design team adopted grooved and perforated wooden acoustic panels as the main wall treatment, targeting the stubborn low-frequency acoustic issues. Based on the Helmholtz resonance principle, the precisely engineered groove and hole structures are optimized for 250Hz–1000Hz mid-low frequency noise. Combined with rear air cavities and mineral wool insulation, the panels achieve full-frequency sound absorption with an overall NRC up to 0.90.
Panels were installed on side walls and the rear wall in a uniform layout, with wood veneer finish matching the simple, elegant style of educational architecture. Post-renovation testing showed reverberation time reduced to the standard range for speech and performances. Sound pressure level difference across all seating areas was within 3dB, ensuring clear, uniform sound for lectures, ceremonies and artistic performances.
