What are the differences between sound-absorbing panels and soundproofing panels, and how should you choose between them during the renovation process?

Acoustic panels and sound insulation panels have distinct differences in function, material structure, and application scenarios, but they are often confused. The following outlines the core differences and selection recommendations for both:

 

Material Characteristics Comparison

1. Acoustic Panels

Material Types:

Porous sound absorption: Mineral wool boards, fiberglass boards, polyester fiber boards (absorb medium to high-frequency sound waves).

Resonant sound absorption: Perforated gypsum boards, perforated wood panels (for sound absorption at specific frequencies).

Installation Method:

Directly attached to walls or ceilings, without requiring complete sealing.

Test Indicator:

Sound Absorption Coefficient (NRC): 0-1, higher values ​​indicate better sound absorption (e.g., NRC 0.8 means absorbing 80% of sound energy).

 

2. Sound Insulation Panels

Material Types:

High-density panels: Gypsum board + sound insulation felt, metal damping panels, rubber composite panels.

Multi-layer structure: Using a "mass-damping-mass" structure (e.g., double-layer gypsum board with sound insulation cotton in between).

Installation Method:

Requires sealed installation (e.g., filling walls/partitions with sound insulation cotton + multi-layer panels) to avoid sound bridges.

Test Indicator:

Sound Transmission Class (STC/Rw): Higher values ​​indicate better sound insulation (e.g., STC 50 means reducing noise by 50 decibels).

 

Common Misconceptions

1. "Acoustic panels can provide sound insulation":

Incorrect: Acoustic panels only reduce reflected sound and cannot block external noise penetration.

Correct: Sound insulation requires a combination of high-density materials and a sealed structure.

2. "Sound insulation panels can eliminate indoor echoes":

 Incorrect: Sound insulation panels do not solve indoor sound reflection problems; they need to be used in conjunction with sound-absorbing materials.

 

Application Scenario Examples

Recording Studio:

Acoustic panels (walls + ceiling) + sound insulation panels (walls + doors and windows) → Controls reverberation and isolates external noise.

 

KTV Room:

Inner layer with acoustic panels (reduces echoes in the room) + outer layer with sound insulation panels (prevents noise leakage).
 

Industrial Plant:

Sound insulation panels enclose equipment + acoustic panels reduce noise reflection within the workshop. Selection Recommendations

1. Clarify your needs:

To improve sound quality → choose sound-absorbing panels; to block noise → choose soundproofing panels.

2. Comprehensive solution:

For scenarios requiring high levels of sound insulation (such as cinemas and bedrooms), both soundproofing structures and sound-absorbing materials are needed.

3. Pay attention to construction details:

Soundproofing panels require strict sealing of gaps, and sound-absorbing panels need to be distributed appropriately (to avoid excessive sound absorption leading to a dry sound).