Selection and Application of Wall Sound-Absorbing Materials

Sound-absorbing panels are functional boards that absorb sound energy through their porous structure. The core principle is to convert incident sound energy into heat energy for dissipation, making the reflected sound energy significantly lower than the incident sound energy. Their material properties are mainly fluffy and porous (such as glass wool, polyester fiber, etc.), and they mainly solve problems such as excessive indoor echo and unclear sound, which is different from sound-insulating panels that block sound transmission with dense materials.

Classification and Performance Comparison of Decorative Sound-Absorbing Panels

1. Fabric sound-absorbing panel (soft upholstery)

Structure: Class A centrifugal glass wool wrapped in fireproof cloth, with optional resin/aluminum alloy frames, and custom patterns available

Performance: Balanced sound absorption across all frequency bands, lightweight and easy to install (weight approximately 3kg/㎡), no dust pollution, and a warm decorative style.

Limitations: The fabric surface is prone to dust accumulation, and it is prone to mildew in environments with humidity > 60%.

Price: 80-150 yuan/square meter (standard specification 600×600×25mm).

Applicable scenarios: Home theaters, KTVs, hotel rooms (need to balance decorativeness and sound absorption effect).

2.Fabric sound-absorbing panel

Structure: High-density base material with grooves and perforations, backed with sound-absorbing felt, and wooden veneer to enhance texture

Performance: Excellent mid-to-high frequency sound absorption (sound absorption coefficient 0.5-0.8), E0 grade environmental protection, moisture-proof and mildew-proof

Limitations: A 5mm expansion joint must be reserved during installation (to prevent thermal expansion and contraction), the wall bearing capacity should be ≥30kg/㎡, and the solid wood version has a 30% premium.

Price: 130-300 yuan/square meter (composite board: 130-200 yuan, solid wood veneer: 200-300 yuan)

Applicable scenarios: recording studios, theaters (with high requirements for voice clarity), corporate meeting rooms, villa background walls (with high-end decoration needs)

3. Perforated Gypsum Board

Structure: Perforated gypsum base board (hole diameter 4-8mm, perforation rate 3-8%), with a sound-absorbing membrane attached to the back

Performance: Significant advantages in low-frequency sound absorption (sound absorption coefficient 0.6-0.9), Class A fire resistance, seamless splicing

Limitations: Weak high-frequency sound absorption (sound absorption coefficient < 0.4), and the construction flatness error must be ≤ 2mm

Price: 25-55 yuan/square meter (standard size 1220×2440×9.5mm, 65-90 yuan per sheet)

Applicable scenarios: gymnasiums, factories (low-cost large-area noise control), office areas, hospital ceilings (combined with air conditioning/lighting systems)

4. Wood wool board

Structure: Composite pressed wood wool and cement, porous structure (NRC up to 0.9)

Performance: Broadband sound absorption (low frequency 0.7-0.9, high frequency 0.8-1.0), Class A fire resistance, impact resistance (can withstand 10kg falling ball impact)

Limitations: Weight reaches 25-30kg/㎡, requires installation with a steel structure framework, and has high transportation costs

Price: mid-to-high-end positioning (imported panels ≥ 200 yuan/square meter, domestic ones 180-280 yuan/square meter)

Applicable scenarios: renovation of historical buildings (auditoriums, libraries, preserving natural textures), gyms, basketball courts (resistant to equipment impact)

5. Polyester Fiber Sound-Absorbing Board

Construction: 100% polyester fiber formed by hot pressing, bendable (minimum radius of curvature 300mm)

Performance: Excellent high-frequency sound absorption (noise reduction coefficient 0.8-1.1), formaldehyde emission 0.05mg/L (E0 grade)

Limitations: Temperature resistance ≤ 120℃; sound absorption performance decreases by 15-20% when humidity ＞ 70%

Price: 100-200 yuan/square meter (20-30% extra charge for custom curved surface/printed models)

Applicable scenarios: studios, art centers (curved design), school classrooms, children's play areas (no risk of falling)

Standard Process of Construction Technology

1. Base treatment and keel installation

Applying sound insulation felt:

Material: 2mm thick butyl rubber sound insulation felt, fully adhered to the original wall, with joint overlap ≥ 50mm

Keel construction: light steel keel + shock absorber (metal keel is mandatory), a 3mm rubber strip is padded between the keel and the wall to prevent resonance

Keel installation specifications: Fix the ceiling/floor keel (expansion screws @600mm) → Vertical keel spacing ≤600mm → Fill with 50mm thick 80kg/m³ centrifugal glass wool (staggered joints)

2. Technical Points for Plate Installation

Application scenario pitfalls guide

1. Core Differences Between Sound-Absorbing Panels and Sound-Insulating Panels

2. Common Construction Errors and Solutions

• ▶ Correction: Use a perforated plate (perforation rate 3-8%) + 50mm cavity structure

• ▶ Specification: The depth of the cavity behind the panel is ≥ 1/4 times the wavelength of the main absorption frequency

• ▶ Alternative: Use pre-finished boards or sound-permeable coatings (pore passing rate ≥ 90%)

Reference for Selection Decision-Making

Budget-oriented selection:

• ▶ Economical type (<100 yuan/㎡): Perforated gypsum board (low-frequency noise control) + polyester fiber board (high-frequency supplement)

• ▶ Mid-range type (100-200 yuan/㎡): Fabric sound-absorbing panels (comprehensive performance) + wood composite panels (decorative)

• ▶ High-end type (>200 yuan/㎡): Wood wool board (durability) + custom metal sound-absorbing board (acoustic design)

Scenario adaptation formula:

• ▶ Home theater: fabric sound-absorbing panels (side walls) + wooden sound-absorbing panels (background wall) + perforated gypsum boards (ceiling)

• ▶ Office space: Perforated gypsum board (ceiling, controlling low-frequency air conditioning noise) + polyester fiber board (wall decoration)

• ▶ Children's places: polyester fiberboard (full-frequency sound absorption + safety anti-collision) + wood wool board (impact-resistant areas)

By clarifying functional requirements, controlling construction details, and avoiding common misunderstandings, the acoustic optimization effect of sound-absorbing panels can be maximized, achieving a balance between scientific noise reduction and spatial aesthetics.