Scholarlink

<p>In this work, composite porous panels incorporating coir pith particles are developed as sustainable acoustic materials for building acoustic applications, using raw graded coir pith particles and a cement binder fabricated through a simple mixing and pressing technology. The resulting composites exhibit favorable porosity for acoustic treatment, and by adjusting the coir pith mixture proportion, their acoustic behavior can be progressively tuned. Several specimens are fabricated with varying coir pith-to-cement volume ratio from 10 to 60%, demonstrating that tuning the mixture proportion enables progressive modification of acoustic behavior for both sound absorption and sound insulation purposes. The results show that the thin coir pith-based panel achieves low-frequency sound absorption and high sound insulation capability. In detail, a 30&#xa0;mm-thick sample with a 60% coir pith-to-cement volume ratio achieves an absorption peak of 0.61 at a frequency of approximately 490 Hz. Simultaneously, this panel can provide a weighted sound reduction index of up to 19 dB. Furthermore, the study confirms that both the sound absorption and sound insulation characteristics of the developed materials can be tailored by varying the aggregate mix proportions and/or the panel thickness. The capability to tailor both acoustic properties by adjusting the coconut coir and cement contents within a broad range, without requiring additives or intermediate processing processes, provides significant potential for industrial-scale manufacturing while accommodating a wide variety of practical product demands. Additionally, a neural network-based model successfully predicts the acoustic behaviors of the coir pith-based composite layers, reinforcing the predictive potential for design and optimization of acoustic structures using the coir pith aggregates. The findings demonstrate that composite porous panels offer a sustainable and tunable solution for architectural acoustic applications.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Experimental Study and Modeling of the Acoustic Performance of Coir Pith-Based Composite Panels

  • 期刊论文

  • 发表日期：

    2026年8月5日

查看全文
  • Duc-Trung Tran,
  • Phuong-Lam Nguyen,
  • Van-Hai Trinh

摘要

In this work, composite porous panels incorporating coir pith particles are developed as sustainable acoustic materials for building acoustic applications, using raw graded coir pith particles and a cement binder fabricated through a simple mixing and pressing technology. The resulting composites exhibit favorable porosity for acoustic treatment, and by adjusting the coir pith mixture proportion, their acoustic behavior can be progressively tuned. Several specimens are fabricated with varying coir pith-to-cement volume ratio from 10 to 60%, demonstrating that tuning the mixture proportion enables progressive modification of acoustic behavior for both sound absorption and sound insulation purposes. The results show that the thin coir pith-based panel achieves low-frequency sound absorption and high sound insulation capability. In detail, a 30 mm-thick sample with a 60% coir pith-to-cement volume ratio achieves an absorption peak of 0.61 at a frequency of approximately 490 Hz. Simultaneously, this panel can provide a weighted sound reduction index of up to 19 dB. Furthermore, the study confirms that both the sound absorption and sound insulation characteristics of the developed materials can be tailored by varying the aggregate mix proportions and/or the panel thickness. The capability to tailor both acoustic properties by adjusting the coconut coir and cement contents within a broad range, without requiring additives or intermediate processing processes, provides significant potential for industrial-scale manufacturing while accommodating a wide variety of practical product demands. Additionally, a neural network-based model successfully predicts the acoustic behaviors of the coir pith-based composite layers, reinforcing the predictive potential for design and optimization of acoustic structures using the coir pith aggregates. The findings demonstrate that composite porous panels offer a sustainable and tunable solution for architectural acoustic applications.