How to Optimize the Acoustic Performance of Perforated GRC Panels? Qinglong GRC Acoustic Design Technology

The acoustic performance of perforated GRC panels is enhanced by optimizing the perforation rate (15%-25%), the cavity depth behind the panel (50-200mm), and filling with sound-absorbing materials (glass wool, rock wool). Proper design can achieve a weighted sound insulation of 30-35dB and a noise reduction coefficient (NRC) of 0.6-0.8. For every 5% increase in the perforation rate, the mid-frequency sound absorption coefficient improves by 0.2.

A concert hall used perforated GRC panels with a 6mm hole diameter, 20mm hole spacing, and 18% perforation rate, with a 100mm cavity behind the panels filled with 50mm thick glass wool. The measured NRC was 0.75, reverberation time 1.8s, with excellent sound quality. Qinglong GRC acoustic panels have been tested by Tsinghua University for architectural acoustics, with all indicators meeting the requirements of GB/T 20247-2006.

Perforation Parameter Design

Hole diameter 4-8mm; hole spacing 15-25mm; these designs affect acoustic performance.

Cavity Depth Optimization

Cavity 50-200mm; these optimizations adjust the resonance frequency.

Sound-Absorbing Material Selection

Glass wool, rock wool; these choices enhance sound absorption.

Comprehensive Performance Balance

Balancing acoustic and structural performance; these balances achieve multifunctionality.

Acoustic optimization requires professional design. Qinglong GRC custom solutions meet acoustic requirements.