人工漂珠制备吸声材料的降噪性能研究

doi:10.11896/cldb.23110073

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Abstract Low-frequency noise pollution has become one of the important environmental pollutants that affect human physical and mental health. The development of low-frequency sound-absorbing materials with high absorption coefficients and low manufacturing costs has always been a significant goal in the noise reduction industry. Artificial floating beads (referred to as floating beads) can be obtained by collecting small particles of abandoned ore after mining or by crushing ore to obtain the required particle size. Then they are prepared using processes such as preheating and calcination. The floating beads have abundant pores on the surface and inside, and therefore have potential sound absorption capabilities. However, their potential as sound-absorbing materials has not been fully explored. This study aims to investigate the sound absorption performance of sound-absorbing materials made from floating beads. Four types of sound-absorbing material samples were prepared by combining floating beads and binders with different particle sizes and dosages. The microstructure of the samples was characterized, and the distribution of pore area was statistically analyzed. The sound absorption coefficients of the four materials were measured using impedance tubes. The results showed that within the parameter range of this study, all four types of sound-absorbing materials effectively absorbed noise in the frequency range of 400—1 000 Hz (with sound absorption coefficients greater than 0. 2). With an increasing in the dosage of floating beads with smaller particle sizes and smaller pores, the sound absorption capacity of the materials prepared from floating beads gradually increased. This was mainly due to the decreasing in pore size, which prolonged the propagation path of sound waves within the material. In addition, the combination of different particle sizes and dosages of floating beads also affected the peak frequency corresponding to the sound absorption coefficient of the materials. In other words, by designing the floating bead ratio, the sensitivity of the sound-absorbing material to a given frequency of noise can be enhanced. This study provides new insights for the development of low-cost sound-absorbing materials using floating beads as the main component.

Key words： artificial float microstructure sound-absorbing materials sound absorption coefficient

Published: 25 November 2024 Online: 2024-11-22

CLC number:

TB321

Fund:National Natural Science Foundation of China (U22A20181,52005419) and the Natural Science Foundation of Sichuan Province (2023NSFSC0859).

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	Articles by authors
	ZHOU Hui
	MO Jiliang
	ZHANG Mengqi
	WANG Haoping
	CHEN Wei
	GONG Kemeng

Cite this article:

ZHOU Hui,MO Jiliang,ZHANG Mengqi, et al. Study on the Noise Reduction Performance of Sound-absorbing Materials Prepared by Artificial Floating Beads[J]. Materials Reports, 2024, 38(22): 23110073-7.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.23110073 OR http://www.mater-rep.com/EN/Y2024/V38/I22/23110073

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