Noise control of an acoustic enclosure covered by a double-wall structure with shallow gap: Design of resonator-like cavities

Li, Y.Y.

doi:10.1016/j.apacoust.2010.02.008

Cited by 5 publications

(3 citation statements)

References 22 publications

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“…Control of sound transmission through a multi-layered structure is an interesting topic of research. (Li, 2010) Depending on the area of use, the structural elements can be sound-absorbing or soundinsulating (Kosała et al, 2020). Most often, the baffle construction consists of two sound-insulating panels, which can be steel, wood, gypsum panels, and a sound-absorbing material which is placed between the two panels (Wang & Ma, 2021;Kosała, 2019).…”

Section: Introductionmentioning

confidence: 99%

Modelling of sound reduction of sound insulating enclosure with recycled rubber covered walls

VILNIŠKIS,

JANUŠEVIČIUS

2023

The 12th International Conference ENVIRONMENTAL ENGINEERING 12th ICEE SELECTED PAPERS

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The excessive noise of machines and devices could be reduced with the use of acoustic enclosures. Additional requirement for enclosures: free air circulation through construction walls, which is important for device ventilation. The acoustic properties of the construction parts are essential to model their ability to reduce noise. The basic properties of airborne sound insulation of construction walls and absorption of used material should be experimentally tested. In this article, sound reduction modelling of acoustic enclosure with recycled materials covered walls was presented. Sound pressure level reduction of enclosure was modelled with Odeon software. A 3D model was created that includes the acoustic properties of the materials used. The enclosure walls consist of two different constructions. The side walls and roof were made from a single plasterboard covered with recycled rubber material. The back and front walls were constructed as louver construction, which plates were mounted with the ability to change the tilt angle which allows to create an air transparent construction. Acoustic properties of the materials used were tested in different ways. Sound absorption properties of 50 mm thick sample of recycled rubber and transmission loss parameters of used sound insulating walls were measured in the impedance tube. The results of the experimental test of the construction parts were included in the 3D model. The modelling results represented a decrease in sound pressure levels with an increasing distance from the enclosure on different sides. Four different enclosures with different tilt angle of louver plates (0°, 15°, 30°, 45°) were modelled. Results were presented in the 125–4000 Hz frequency range. According to the results, efficiency of enclosure sound reduction with 45° tilted plates could reach up to 12 dB.

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Section: Introductionmentioning

confidence: 99%

Modelling of sound reduction of sound insulating enclosure with recycled rubber covered walls

VILNIŠKIS,

JANUŠEVIČIUS

2023

The 12th International Conference ENVIRONMENTAL ENGINEERING 12th ICEE SELECTED PAPERS

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“…Ning et al ( 2015 ) used a quasi-one-dimensional model based on the compressible Navier–Stokes equations and a finite volume method to investigate the transient motion of a fluid inside oscillating axisymmetric tubes. Li ( 2010 ) developed an objective function to optimize parameters (number and location) of resonator-like cavities, which is based on the tuned weighting coefficient and the acoustic potential energy. Unnikrishnan et al ( 2010 ) presents a simplified modeling approach for numerical simulation of a coupled cavity-resonator system, which was validated by experimentation.…”

Section: Introductionmentioning

confidence: 99%

Modeling and experimental verification of a new muffler based on the theory of quarter-wavelength tube and the Helmholtz muffler

Chen

et al. 2016

SpringerPlus

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To address the problem of low frequency noise of the internal combustion engine, several existing muffler design methods, such as the theory of the quarter-wavelength tube and the Helmholtz muffler, were examined and compared. This paper proposes a new type of muffler design method, which has the advantages of both the quarter-wavelength tube and the Helmholtz muffler. An example is carried out to illustrate the analysis of original signal, the design of the new muffler and the improvement of the in-car noise. The transmission loss of the new muffler is studied by theoretical method and finite element method. The vehicle test of the new muffler demonstrates excellent performance with a wider noise elimination frequency band and smaller radial size.

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“…Research focusing on different methods of concealing the noise source includes studies by Pääkkönen and Tikkanen [8], who constructed a low-frequency noise cabin with a sound frequency of 0.2-320 Hz; Locati et al [9], who designed a special noise cabin; Dupont and Galland [10], who designed an active absorber for a noise cabin; Li [11], who used a two-walled acoustic cabin, where voids served as resonators in the walls; Tarabini and Roure [12], who modelled the parameters affecting the active noise control on a cabin wall; and finally, Yu and Cheng [13], who investigated the optimization of the location of T-shaped acoustic resonators.…”

Section: Introductionmentioning

confidence: 99%

Using of CelluBOR on Noise Enclosures

Dal¹,

Omer²

2016

Fourth International Conference on Advances in Civil, Structural and Mechanical Engineering - CSM 2016

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Abstract-An investigation was conducted into the reduction of the noise caused by machines used in the manufacturing industry. Four noise cabin models, outfitted with two types of insulation-materials for the cabin walls -Styrofoam (Expander Polystyrene -EPS) and CelluBOR -were constructed. For each cabin model, a high-level noise source was employed, in accordance with operation conditions, to perform noise measurement and frequency analysis. The results indicated that CelluBOR was an effective material for ensuring noise insulation

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Noise control of an acoustic enclosure covered by a double-wall structure with shallow gap: Design of resonator-like cavities

Cited by 5 publications

References 22 publications

Modelling of sound reduction of sound insulating enclosure with recycled rubber covered walls

Modelling of sound reduction of sound insulating enclosure with recycled rubber covered walls

Modeling and experimental verification of a new muffler based on the theory of quarter-wavelength tube and the Helmholtz muffler

Using of CelluBOR on Noise Enclosures

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