The sound insulation performance of movable partitions depends on a combination of material choice, structural design, and sealing efficiency. Key considerations include:
Material Selection
High-Density Fiberboard: Materials like medium-density fiberboard (MDF) and high-density fiberboard (HDF) are effective in reducing sound transmission due to their high density.
Sound Insulation Felt: Embedded sound insulation felt can block mid-to-high frequency noise, improving the Sound Transmission Class (STC) by 3-5 dB.
Sound Absorbing Cotton: Filled with sound-absorbing glass fiber or mineral wool, it absorbs sound energy and reduces reflection.
Multi-Layer Structure: A design incorporating a double-layer board and air gap utilizes air damping to further reduce noise.
Structural Design
Sandwich Composite Structure: Sound-absorbing cotton and sound insulation felt placed between two boards form a "blocking-absorbing-blocking" noise reduction system.
Flexible Connections: Elastic sealing strips minimize solid-borne sound transmission, preventing noise leakage from power outlets and pipes.
Sealing Performance: All gaps are sealed with sound-absorbing strips and high-density strips, along with bottom door seals to prevent sound leakage.
Typical Cases
Type 65 Movable Partition: Features a single-layer high-density fiberboard and sound-absorbing cotton with an STC of 32 dB, suitable for open-plan office spaces.
Type 105 Movable Partition: A double-layer 105mm board with a multi-layer sound-absorbing structure and an STC of 45 dB, ideal for VIP meeting rooms.
Accurate measurement is essential to ensure both the sound insulation performance and the installation quality of movable partitions. The following procedures should be followed:
Tool Preparation
Laser Rangefinder: Used for measuring length, width, and height, with an accuracy of ±1mm.
Inside Micrometer: Measures irregular structures such as tracks and beams, with a range of 50-5000mm.
Level and Plumb Line: Verifies wall verticality and floor flatness, with an error tolerance of ≤2mm/2m.
On-Site Measurement
Basic Dimension Measurement: Record the maximum and minimum values for length, width, and height.
Irregular Structure Measurement: Measure the width, depth, and bending radius of tracks, ensuring smooth partition movement.
Permissible Deviation Standards
Verticality: ≤3mm (measured using a 2-meter verticality gauge).
Surface Flatness: ≤2mm (using a 2-meter straightedge and feeler gauge).
Joint Straightness: ≤3mm (measured with a 5-meter straight line).
Integrating material selection with precise measurement ensures optimal sound insulation performance:
Material and Measurement Integration: Customize the thickness of the sound insulation boards (e.g., 65mm, 85mm, 105mm) according to room dimensions to avoid sealing failure.
Sound Bridge Risk Prevention: Mark potential sound bridge locations, such as pipes and electrical outlets, and use flexible connections in the design to reduce noise transmission.
Dynamic Adjustment: After installation, use a sound level meter to test the actual sound insulation performance. If the STC does not meet the desired level, optimize it by adding sound insulation felt or adjusting sealing strips.
Ensuring high-quality sound insulation for movable partitions requires a combination of material science, structural design, and precise measurement. Companies should establish standardized measurement procedures, use acoustic simulation software for analysis, and continuously optimize designs to meet industry standards.
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