Effects of mounting positions and boundary conditions on the sound transmission loss of panels in a niche

Yao, Dan; Zhang, Jie; Wang, Ruiqian; Xiao, Xinbiao

doi:10.1631/jzus.a1900494

Cited by 9 publications

(3 citation statements)

References 22 publications

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“…In addition to simulation and theoretical prediction, sound insulation measurement is one of the main research methods for model validation and verification before proceeding to engineering applications [65,66]. For small specimens, with the development of 3D printing technology [67], impedance tubes are mainly used to test normal sound insulation (the diameter of medium-and low-frequency sound insulation test specimens is generally 100 mm), as shown in Figure 2 [68].…”

Section: Measurement Of Sound Insulationmentioning

confidence: 99%

Research Progress on Thin-Walled Sound Insulation Metamaterial Structures

Zhang,

et al. 2024

Acoustics

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Acoustic metamaterials (AMs) composed of periodic artificial structures have extraordinary sound wave manipulation capabilities compared with traditional acoustic materials, and they have attracted widespread research attention. The sound insulation performance of thin-walled structures commonly used in engineering applications with restricted space, for example, vehicles’ body structures, and the latest studies on the sound insulation of thin-walled metamaterial structures, are comprehensively discussed in this paper. First, the definition and math law of sound insulation are introduced, alongside the primary methods of sound insulation testing of specimens. Secondly, the main sound insulation acoustic metamaterial structures are summarized and classified, including membrane-type, plate-type, and smart-material-type sound insulation metamaterials, boundaries, and temperature effects, as well as the sound insulation research on composite structures combined with metamaterial structures. Finally, the research status, challenges, and trends of sound insulation metamaterial structures are summarized. It was found that combining the advantages of metamaterial and various composite panel structures with optimization methods considering lightweight and proper wide frequency band single evaluator has the potential to improve the sound insulation performance of composite metamaterials in the full frequency range. Relative review results provide a comprehensive reference for the sound insulation metamaterial design and application.

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Section: Measurement Of Sound Insulationmentioning

confidence: 99%

Research Progress on Thin-Walled Sound Insulation Metamaterial Structures

Zhang,

et al. 2024

Acoustics

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“…Yao et al. [184] examined two generic inward floor panels in a series of mounting and mechanical boundary conditions to analyze the vibroacoustic behavior using the FE technique. Although both mounting locations and mechanical boundary conditions could affect the low-frequency STL, at higher frequencies, it was mostly impressed by only the mechanical boundary conditions.…”

Section: Incident Fieldsmentioning

confidence: 99%

Prediction of acoustic wave transmission features of the multilayered plate constructions: A review

Zarastvand

Ghassabi

Talebitooti

2021

Jnl of Sandwich Structures & Materials

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This study collects all of the existent papers in the field of acoustic transmission across multilayered plate constructions. Herewith, a comprehensive source is proposed wherein approximately 410 references are reviewed and described from the first [Formula: see text] to [Formula: see text]. In the first part, in addition to the presentation of a complete explanation about the importance of the acoustic analysis of these structures, appropriate formulations are also provided. Furthermore, an overview of the thematic correspondent is carried out. Since the type of material used in these constructions can be very important in sound insulation, the significance of this subject is remarked. The papers are then classified based on their acoustic excitation fields containing plane wave, diffuse, random, and point source. After analyzing the research approaches according to different environmental properties, the articles are ordered based on their boundaries as finite and infinite. To present reliable outcomes, it is necessary to investigate a proper theory proportional to the structure’s thickness. Herewith, this issue is also discussed in detail. The review is also expanded to focus on the different vibroacoustic solutions. Before concluding remarks, the authors' research works are presented wherein either optimization algorithms or control techniques improve the acoustic performance of these structures.

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“…6 Another study was conducted to analyze the effect of transmission loss by examining the boundary conditions of the vehicle body. 7 In addition, the use of viscoelastic materials was investigated to reduce the noise and vibration of the vehicle body. 8 In general, studies on improving the transmission loss of railroad vehicles have been conducted for a vehicle body made of aluminum, and therefore, their consideration of the bellows made of silicon rubber is limited.…”

Section: Introductionmentioning

confidence: 99%

Improvement of transmission loss of bellows through thickness improvement and structural modification

Noh

2021

Advances in Mechanical Engineering

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The bellows of the vehicle are vulnerable to noise because of the low transmission loss among the components. Therefore, in this study, we modified the thickness and the structure of the bellows to improve transmission loss. Based on the impedance tube test, the transmission loss of the silicon rubber specimen – the main material of the bellows – was analyzed; the results confirmed low transmission loss in the low-frequency region. An analysis of the natural vibration model of the simple model indicated that in the low-frequency region of the bellows, a number of vibrations occurred because of the vibration of the outer and inner components. Accordingly, to improve transmission loss, the improvement introduced by varying the thickness was analyzed, and the results confirmed that the noise performance improved by more than 3 dB for a thickness of 3.5 mm in the double-layer structure. In addition, the transmission loss improved in the low-frequency region after acoustic-structure coupling analysis was performed based on a simple model. To compare the actual performance between the existing and improved bellows, a noise comparison test was performed. The test results confirm that the existing noise reduction index improved by 3 dB from 30 to 33 dB when the thickness was increased to 3.5 mm; in the frequency domain, the highest noise performance was improved with an improvement of 5.6 dB at 160 Hz.

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Effects of mounting positions and boundary conditions on the sound transmission loss of panels in a niche

Cited by 9 publications

References 22 publications

Research Progress on Thin-Walled Sound Insulation Metamaterial Structures

Research Progress on Thin-Walled Sound Insulation Metamaterial Structures

Prediction of acoustic wave transmission features of the multilayered plate constructions: A review

Improvement of transmission loss of bellows through thickness improvement and structural modification

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