Abstract
The continuing development of industrialization and increasing population density has led to the emergence of noise as an increasingly common problem, requiring various types of sound absorption and insulation methods to address it. Meanwhile, the recycling of resources to ensure a sustainable future for the planet and mankind is also required. Therefore, this study investigates the potential of corrugated cardboard as a resource for noise reduction. The sound absorption and insulation performance of non-perforated corrugated cardboard (NPCC) were measured, and modified corrugated boards were fabricated by drilling holes either through the surface of the corrugated board alone or through the corrugated board in its entirety. The sound-absorption/insulation performance both of perforated corrugated cardboard (PCC) and perforated corrugated cardboard with multi-frequency resonators (PCCM) were measured using the transfer function method and the transmission matrix method. To determine the effectiveness of NPCC, PCC, and PCCM in noise reduction, the sound pressure level was analyzed by applying it to a home blender. The results showed PCCM’s sound absorption and insulation performance to be excellent. On the basis of these findings, we propose the use of PMMC as an eco-friendly noise-reduction material.
Highlights
Because Republic of Korea is a country with small land mass and high population density, apartment housing is common [1]
A significant amount of research has been conducted in order to identify materials with excellent sound absorption and sound insulation properties [6,7]
The blender was enclosed with the non-perforated corrugated cardboard (NPCC), perforated corrugated cardboard (PCC), and perforated corrugated cardboard with multi-frequency resonators (PCCM) covers, and noise levels measured
Summary
Because Republic of Korea is a country with small land mass and high population density, apartment housing is common [1]. Kang and Seo [31] investigated changes to the resonant frequency of the cardboard as a function of changes to the aperture ratio They found no significant changes but reported that sound absorption at a specific frequency was significantly increased by perforations of a certain depth and size. The sound absorption and insulation properties of each of these types were measured using the transfer function method and the transmission matrix method To test these corrugated sound-absorbing materials, they were applied to the use case of home blenders. The noise reduction effect on the blender was evaluated by measuring and comparing the sound-absorption rate, acoustic transmission loss, and noise level of the fabricated single-resonator and multi-resonator-perforations in relation to hole diameter and perforation ratio
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