Predicting Model of Sound Absorbing Properties of Cellulose-based Porous Materials Prepared by Foam Forming

ABSTRACT

Cellulose-based porous materials with a three-dimensional network skeleton and sound-absorbing properties prepared by foam forming were successfully made in this study. A refitted empirical model based on the Delany-Bazley model had been developed to predict the sound absorption coefficient of cellulose-based porous materials. The parameters of the model had been adjusted to best fit the values of flow resistance rate and sound absorption coefficient measured by the double-thickness method. The results showed that the average error of the fitted model between 200 and 6300 Hz was only 3.2%, indicating that the new model could predict the basic acoustic properties of cellulose-based porous materials with a measured flow resistance rate.

摘要

本研究成功制备了具有三维网状骨架和吸声性能的纤维素基多孔材料. 基于Delany-Bazley模型, 建立了一个修正的经验模型, 用于预测纤维素基多孔材料的吸声系数. 对模型参数进行了调整, 使其与双厚度法测得的流阻率和吸声系数值最为吻合. 结果表明, 在200-6300 hz范围内, 拟合模型的平均误差仅为3.2%, 表明新模型可以通过测量的流动阻力率预测纤维素基多孔材料的基本声学特性.

KEYWORDS:

• Cellulose-based porous material
• foam forming
• refitted empirical model
• sound absorption coefficient
• flow resistance rate
• prediction

关键词:

• 纤维素基多孔材料
• 泡沫成型
• 修正的经验模型
• 吸声系数
• 流动阻力率
• 预测

Highlights

• Cellulose-based porous material with excellent sound-absorbing performance was prepared by foam forming technology.

• A refitted empirical model based on the Delany-Bazley model had been developed to predict the sound absorption coefficient of cellulose-based porous materials.

• The results showed that the average error of the fitted model between 200 and 6300 Hz was only 3.2%.

Disclosure statement

No potential conflict of interest was reported by the author(s).