Near-field effects on the sound transmission and absorption of elastic micro-perforated plates in impedance tubes

Kim, Hyun‐Sil; Ma, Pyung-Sik; Kim, Bong-Ki; Kim, Sang-Ryul; Lee, Seong-Hyun

doi:10.1016/j.jsv.2021.116001

Cited by 11 publications

(6 citation statements)

References 36 publications

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“…With 77 occurrences, the second most common keyword was "microperforated panels." A perforated panel is a kind of sound-absorbing material that absorbs resonance [18] that is not the same as a porous material. These resonance sound absorbers function based on the internal resonance effect [19] to absorb low-frequency noises (100 Hz -500 Hz) [20].…”

Section: Methodsmentioning

confidence: 99%

Trend of Sound Absorption Research: A Bibliometric Analysis

Yap

Liew

Khalid

et al. 2022

Civil and Environmental Engineering

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The growing world population and urbanization have worsened noise pollution, driving the development of sound absorption (SA) research across the globe. This study aims to analyse the SA global research trends and discover the opportunities for future development or collaboration using systematic bibliometric analysis. A total of 2970 articles since 1913 were systematically retrieved. Results reveal that the most productive journal had taken 10.3 % of the total publications. A high correlation r = 0.87 was found between the number of co-authorship and the h-index of a scholar. China has the highest number of publications 55.3 % and most research focused on porous materials. Present findings could be helpful to further develop SA from a global level perspective.

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Section: Methodsmentioning

confidence: 99%

Trend of Sound Absorption Research: A Bibliometric Analysis

Yap

Liew

Khalid

et al. 2022

Civil and Environmental Engineering

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“…A two-microphone transfer function method with an impression tube kit (type 4206, B&K Company, Naerum, Denmark) was employed to measure the sound absorption coefficient. Pulse analysis software (Pulse version 21) and a spectrum analyzer (type 3560, B&K Company, Naerum, Denmark) were used for sound absorption analysis [37,38]. Figure 2 illustrates the schematic diagram of the impedance tube.…”

Section: Measurement Of Properties For Sound-absorbing Materialsmentioning

confidence: 99%

Study on the Sound Absorption Properties of Recycled Polyester Nonwovens through Alkaline Treatment and Dimple Processing

Yu,

Park,

Kang

et al. 2024

Surfaces

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This study focused on manufacturing efficient automobile sound-absorbing materials through alkaline treatment and dimple processing of recycled polyethylene terephthalate (rPET) nonwoven fabric. The rPET nonwoven fabric was produced with a sound-absorbing material through compression molding. It was improved through the development of porous sound-absorbing materials through alkaline treatment and resonant sound-absorbing materials through dimple processing. As a result of morphological analysis, alkaline treatment showed that pore size and air permeability increased according to temperature and concentration increase conditions. On the other hand, dimple processing caused a decrease in air permeability and a decrease in pores due to yarn fusion, and as the dimple diameter increased, the sound-absorbing coefficient increased in the 5000 Hz band. Finally, it was judged that effective sound absorption performance would be improved through a simple process through alkaline treatment and dimple processing, and thus there would be applicability in various industrial fields.

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“…The slit plates are 3D printed by using photosensitive resin, whose mass density ρ p = 1150kg • m −3 , elastic modulus E p = 2.6 GPa and Poisson's ratio υ = 0.4 indicate that the samples are relatively soft and thin, and plate vibration caused by sound-structure coupling into the slit plates must be considered. Since the distance l p and plate thickness are much lower than the acoustic wavelength, the distributed particle velocity ṽ can be expressed as the average of the plate velocity v p and the fluid velocity v s through the slit [38][39][40][41]:…”

Section: Design and Theorymentioning

confidence: 99%

A subwavelength ventilated structure for efficient broadband sound insulation

Hong

Sun

Tang

et al. 2023

J. Phys. D: Appl. Phys.

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Multifunctional structures such as ventilated sound barriers, have become the focus of recent research on the noise reduction and environmental comfort. However, its large size and complex inner structure hinder its potential applications. Novel structures with side-branch sectorial Helmholtz resonators (SHRs) and double-layered perforated slit plates enlightened by macro- perforated plates to enhance the soundproof performance and facilitate natural ventilation are proposed and experimentally validated. Compared with simple muffler ducts, the combinations with slit plates provide a smoother transmission loss (TL) curve with a broad and continuous TL band. We also study the influences of the independent parts and interactive effects of the assembly on the sound field, including the frequency migration and plate vibration. The proposed sub-wavelength structures with a thickness of 15mm can obtain TL values up to 25dB with a broad bandwidth from 930Hz to 1600Hz. Moreover, soundproof walls can be fabricated by using these structures with plenty of ventilated slits to freely exchange air and heat. This ventilation sound barrier is suitable for acoustic landscape buildings as it covers the main frequency spectrum of a human equal loudness contour.

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Near-field effects on the sound transmission and absorption of elastic micro-perforated plates in impedance tubes

Cited by 11 publications

References 36 publications

Trend of Sound Absorption Research: A Bibliometric Analysis

Trend of Sound Absorption Research: A Bibliometric Analysis

Study on the Sound Absorption Properties of Recycled Polyester Nonwovens through Alkaline Treatment and Dimple Processing

A subwavelength ventilated structure for efficient broadband sound insulation

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