How to Optimize the Acoustic Performance of Perforated GRC Panels: A Study of Key Technologies and Application Strategies

As a new decorative material that integrates acoustic functionality with architectural aesthetics, perforated GRC panels are gradually becoming the ideal choice for acoustically sensitive venues such as grand theaters, concert halls, and conference centers. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group, drawing on a deep understanding of material properties and acoustic principles, has achieved precise control over the acoustic performance of perforated GRC panels by optimizing perforation structures, composite sound-absorbing layer design, and installation techniques, endowing architectural spaces with the dual value of artistic expression and acoustic comfort.

### I. Core Technical Approaches for Acoustic Optimization of Perforated GRC Panels

The acoustic performance of perforated GRC panels depends on the material's sound absorption coefficient, sound insulation, and structural resonance characteristics; optimization requires coordinated breakthroughs in three areas: material formulation, perforation parameters, and composite construction. During the detailed design phase, Qinglong Group uses BIM technology to simulate the effects of different perforation rates (5%-25%), hole diameters (3mm-15mm), and hole spacing combinations on sound waves, and customizes parameter solutions based on each project's actual acoustic needs. For example, in a grand theater project in Dongguan, a GRC substrate reinforced with 1.2mm glass fiber was adopted together with a hexagonal array design featuring Φ8mm hole diameters and a 15% perforation rate, raising the sound absorption coefficient in the low-frequency range (125Hz-500Hz) to above 0.6 and effectively solving the problem of muddy sound fields in large spaces. For more industry information: +WeChat qlfsbl123

### II. Composite Construction Design: From Single Sound Absorption to Multifunctional Integration

Perforated GRC panels alone can hardly meet the acoustic requirements of complex scenarios. Qinglong Group innovatively adopts a composite construction system of “perforated GRC panel + air layer + porous sound-absorbing material”, achieving broadband sound absorption through material combinations. In a convention and exhibition center project in Nanjing, the back of the substrate was composited with 50mm thick centrifugal glass wool and a breathable backing to form a resonance sound-absorbing structure, achieving a sound absorption coefficient of 0.85 in the mid-to-high frequency range (1000Hz-4000Hz), while adjusting the air layer thickness (50mm-150mm) further optimized low-frequency sound insulation performance. In addition, for humid environments (such as swimming pools), GRP material can be selected as the panel, leveraging its corrosion resistance to ensure long-term acoustic performance stability.

### III. Key Impact of Installation Techniques on Acoustic Performance

The installation precision of perforated GRC panels directly affects the consistency of acoustic performance. Qinglong Group employs 3D laser scanning positioning technology to achieve component installation errors of ≤2mm, preventing sound wave leakage caused by joint gaps. In a music hall ceiling project in Guangzhou, modular splicing design and elastic sealing treatment effectively reduced vibration and noise transmission, while the lightweight nature of GRC material (weighing only 1/4 of traditional stone) reduced the load on the building structure. It is worth noting that during installation, the keel spacing and panel fixing methods must be strictly controlled to prevent secondary sound bridges and ensure that acoustic design targets are achieved. For more industry information: +WeChat qlfsbl123

### IV. Typical Applications and Technical Advantages of Qinglong Perforated GRC Panels

With full-chain service capabilities, Qinglong perforated GRC panels have been successfully applied in many landmark projects at home and abroad. In a cultural center facade project in Malaysia, the perforation structure and ventilation design were optimized according to the local tropical climate, achieving the dual functions of acoustic noise reduction and building heat dissipation. In the lobby of a high-end hotel in China, a combination of GRG substrate and perforated GRC shapes was adopted; through curved surface transitions and acoustic texture design, it not only met the visual and artistic requirements but also controlled the reverberation time within 1.5 seconds. As a participating drafting organization of the “Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC)”, Qinglong Group has always taken technological innovation as its core; its perforated GRC panels have not only passed acoustic performance certification by the National Building Materials Testing Center, but can also provide one-stop solutions from detailed design to after-sales maintenance according to project needs, making Qinglong a reliable partner for designers and owners in achieving the integration of acoustics and aesthetics.