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Published in:
01-04-2025 | Original Paper
Sound absorption properties and mechanism of two-sized micro-perforated nanofiber membrane
Authors: Xiaofei Shao, Xiong Yan
Published in: Journal of Polymer Research | Issue 4/2025
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Abstract
The article delves into the critical issue of noise pollution and its detrimental effects on health and quality of life, emphasizing the need for effective noise reduction solutions. It introduces a novel nanofiber membrane with two different micro-perforation sizes, designed to enhance sound absorption, particularly in the low and medium frequency ranges. The study examines the impact of various structural parameters, including the presence of partitions, perforation parameters, fiber membrane thickness, and cavity depth, on the sound absorption performance of this innovative material. Through detailed experimental and theoretical analyses, the article demonstrates how these parameters can be optimized to achieve superior acoustic absorption. The findings highlight the potential of this nanofiber membrane for applications in environments with limited space, offering a lightweight, flexible, and cost-effective solution for noise reduction. The article also provides a theoretical model that accurately predicts the sound absorption coefficient, validating the experimental results and offering a robust framework for future research and development in acoustic materials.
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Abstract
Thin and small low-frequency sound absorption structures have been an important research topic. In this paper, we combined the features of nanofiber membrane and micro-perforated structure to prepare a two-sized micro-perforated nanofiber membrane and explored its acoustic performance and mechanism as a small-size acoustic structure in the field of low-frequency noise reduction. The low-cost, non-toxic, and high-spinning speed polyvinyl butyral (PVB) was used as the raw material, which was developed into the nanofiber membrane by electrospinning. On this basis, PVB two-sized micro-perforated nanofiber membranes were fabricated through mechanical drilling. The effects of partition, perforation parameters, thickness, and cavity depth on acoustic performance were investigated theoretically and experimentally. The results demonstrated that the two-sized micro-perforated nanofiber membrane had excellent acoustic performance both in the low and medium frequencies. The addition of the partition not only broadened the sound absorption bandwidth but also shifted the resonance absorption peak to low frequency. Furthermore, by reasonably selecting and optimizing the structural parameters such as perforation parameters, fiber membrane thickness, and cavity depth, the range of effective sound-absorbing frequency bands could be adjusted to better meet the demand for noise reduction. Two-sized micro-perforated nanofiber membrane’s effective acoustic absorption bandwidth could reach 2,136 Hz in the 100–2,500 Hz range, which accounted for about 89% of the whole bandwidth. PVB two-sized micro-perforated nanofiber membrane with its superior sound absorption performance and thin fiber structure body become the ideal choice for flexible and lightweight acoustic materials in the field of acoustic noise reduction.
