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<p>Lightweight frame walls are widely utilized in construction due to their lightweight design, ease of installation, and cost-effectiveness. However, increasing demand for privacy and comfort necessitates improvements in their airborne sound and thermal insulation performance. This study addresses critical challenges such as “acoustic/thermal bridge”, low-frequency resonance, and high-frequency coincidence effects. By integrating advanced materials and innovative structural designs, a novel dual-cavity wall system is introduced to enhance performance. The weighted sound insulation index (<i>R</i><sub><i>w</i></sub>) was calculated and validated through COMSOL Multiphysics simulations and theoretical thermal insulation calculations. The results demonstrate, compared to traditional lightweight wood frame walls, the <i>R</i><sub><i>w</i></sub> of midply wood walls and light steel frame (LSF) walls increased from 43 to 52 dB, elevating the sound insulation level from 4 to 7. The heat transfer coefficient of the midply wood wall decreased to 0.63&#xa0;W·m<sup>− 2</sup>·K<sup>− 1</sup> after insulation measures, while the “thermal bridge” effect in LSF walls was substantially reduced. Simulation and theoretical predictions showed good agreement with experimental measurements, validating the proposed enhancements. This study offers a scalable, cost-effective solution for modern construction, tackling urban noise and energy efficiency. It advances sustainable building solutions, aiding global carbon reduction and indoor environmental quality improvement.</p>

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Enhanced airborne sound and thermal insulation in lightweight frame walls with dual-cavity structure

  • 期刊论文

  • 发表日期：

    2026年2月3日

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  • Kong Yue,
  • Xutong Zhuang,
  • Xiangyu Cheng,
  • Chuanqi Cheng,
  • Yucai Zhang,
  • Xinlei Shi,
  • Wu Peng,
  • Quan Li

摘要

Lightweight frame walls are widely utilized in construction due to their lightweight design, ease of installation, and cost-effectiveness. However, increasing demand for privacy and comfort necessitates improvements in their airborne sound and thermal insulation performance. This study addresses critical challenges such as “acoustic/thermal bridge”, low-frequency resonance, and high-frequency coincidence effects. By integrating advanced materials and innovative structural designs, a novel dual-cavity wall system is introduced to enhance performance. The weighted sound insulation index (Rw) was calculated and validated through COMSOL Multiphysics simulations and theoretical thermal insulation calculations. The results demonstrate, compared to traditional lightweight wood frame walls, the Rw of midply wood walls and light steel frame (LSF) walls increased from 43 to 52 dB, elevating the sound insulation level from 4 to 7. The heat transfer coefficient of the midply wood wall decreased to 0.63 W·m− 2·K− 1 after insulation measures, while the “thermal bridge” effect in LSF walls was substantially reduced. Simulation and theoretical predictions showed good agreement with experimental measurements, validating the proposed enhancements. This study offers a scalable, cost-effective solution for modern construction, tackling urban noise and energy efficiency. It advances sustainable building solutions, aiding global carbon reduction and indoor environmental quality improvement.