Structural and acoustical performance of recycled glass bead panels

Aygun, Haydar; McCann, Finian

doi:10.1016/j.conbuildmat.2020.119581

Cited by 12 publications

(24 citation statements)

References 18 publications

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“…18 Recycled glass bead panels are structural components comprising two fibreglass facing sheets surrounding an inner core of recycled glass beads bonded in a matrix of polyurethane (PU) resin. 15 Glass-bead panel is 130 mm thick with a nominal glass bid diameter of 4-8 mm. Black plate which is 20 mm thick, is black foam saturated by air, and is fabricated from particles of plastic foam obtained from recycled car dashboards.…”

Section: Measurements Resultsmentioning

confidence: 99%

“…The sound signals at four fixed microphone locations within the tube were simultaneously measured. Microphones 1 and 3 15 for upstream tube and 4 and 6 for downstream tube are used to measure the transmission loss of this sample between 63 and 500 Hz while microphones 2 and 3 for upstream tube, and 4 and 5 for downstream tube are used to measure between 250 and 1600 Hz. The incident and reflected energy from the measured transfer function, were separated using Transfer Function Method and then estimates the sound transmission loss of the tested sample installed in the tube.…”

Section: Sound Transmission Loss Through Circular Panelsmentioning

confidence: 99%

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Acoustic wave propagation through eco-friendly porous panels at normal incidence

Aygun,

Gomez-Agustina,

Mundula

2023

Building Acoustics

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Human and non-human subjects are exposed to micro plastics through drink, food, and air. Micro-plastics propagating through atmosphere are breathable particles during inhalation and exhalation leading to deposition of them in the deep lung via the alveoli of the lungs. Teabags are made of plastics that are not recyclable and biodegradable. Therefore, we intend to remove used teabags from the natural environment by repurposing them to make sound attenuating panels for building and architectural industries, contributing in this way to a sustainable circular economy. The panels were designed and developed from consumed teabags as porous material by filling a frame to investigate acoustics wave propagation through them at normal incidence. Experimental testing was carried out on circular teabag panels in an impedance tube using a transfer function method to determine their sound absorption coefficient and transmission loss. Furthermore, the impedance gun method was used to determine the absorption properties of square panels. Results show that 75 mm thick circular panels give an absorption coefficient higher than 0.8 between 400 and 1600 Hz. Up-to 9.8 dB sound transmission loss of circular panels is obtained at higher frequencies. Absorption coefficients for square teabag panels are very good despite a coincidence-dip seen at 800 Hz. The satisfactory sound absorption and sound transmission characteristics of acoustic panels made of consumed tea bags can make this recycled material a cost-effective solution in the production of sustainable acoustic treatment in indoor spaces. The results suggest that recycling of consumed teabag as the panel could be applied as alternative sound absorbing materials.

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Section: Measurements Resultsmentioning

confidence: 99%

Section: Sound Transmission Loss Through Circular Panelsmentioning

confidence: 99%

Acoustic wave propagation through eco-friendly porous panels at normal incidence

Aygun,

Gomez-Agustina,

Mundula

2023

Building Acoustics

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“…Variational method that is based on the Rayleigh-Ritz model, can be used to determine the radiation of sound from the plates that are immersed either in a light fluid or in a heavy fluid by reducing the quadruple integral into a double integral using a specific change of variable and by integrating the double integral with a numerical method using Gaussian quadrature formulae [25][26][27][28]. An investigation was carried out on composite recycled glass bead panels to assess their suitability for civil engineering application, especially in noisy urban environments, either as structural panel components that also offer acoustic insulation or as dedicated noise barriers for outdoor applications [29]. Recently, vibroacoustic properties of thin plates was studied for different boundary conditions [30][31].…”

Section: Of 13mentioning

confidence: 99%

Vibrational and Acoustical Wave Propagation Through Fibreglass Plate for Different Boundary Conditions

Aygun¹

2023

Preprint

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Fibreglass composite plates are used for applications ranging from aerospace and automotive industries to construction industry. Vibroacoustic properties of the fibreglass plate has been investigated for different boundary conditions. The theory of the plate vibration and sound radiation has been used to determine the deflection of the composite plate at different locations on its surface. 3-Dimentional (3D) deformations and their corresponding contour velocities of plate have been computed for a range of frequencies. It has been shown that clamping the plate at four edges delayed first resonance of the plate by 15 Hz and second resonance of the plate by 30 Hz. Vibroacoustic indicators and the radiation impedance matrix of the plate have also been calculated. The results of this study show that fibreglass plate could be used in building industry to dampen the vibration of machine and structural vibration of buildings, and to sandwich building structures to form panels in order to attenuate airborne sound and to lower noise transmission of structural borne sound

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“…Microphones 1 and 3 for upstream tube and 4 and 6 for downstream tube are used to measure the transmission loss between 63 Hz and 500 Hz while microphones 2 and 3 for upstream tube, and 4 and 5 for downstream tube are used to measure the TL of noise barriers between 250 Hz and 1600 Hz. The VA_LAB using Transfer Function Method separates the incident and reflected energy from the measured transfer function, and then estimates the acoustic properties of the tested sample installed in the tube [7].…”

Section: -Transmission Loss Measurements Using the Impedance Tubementioning

confidence: 99%

Acoustic wave propagation through panels that are made of used tea bags

Mundula

Aygun²

2023

inter noise

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These days more than ever, society habits raise the necessity to consider the future of the environment. This presentation will tackle the aspect of more eco-friendly acoustic materials, more specifically analysing the properties of consumed tea bags, starting from the collection up to the application and measurement of the final product. Many good options are often avoided, or not implemented for the lack of reliable properties analysis, encouraging existing materials to be chosen instead, the more information could be found about new materials, the more these could have a chance to be used, compared, or eventually improved. Sound absorbing panels that are made of tea bags were designed and developed to investigate acoustic sound transmission through tea-bag panels. Measurements were carried out on tea-bag panels in an impedance tube using a transfer function method to determine their sound absorption and transmission loss. Furthermore, the impedance gun system was used to determine acoustical properties of larger panels. Results show that 70 mm thick panels give an absorption coefficient higher than 0.8 between 500 Hz and 1600 Hz while 17 mm thick panels give an absorption coefficient that is mostly effective at higher frequencies. Up to 9 dB sound transmission loss is obtained at some frequencies.

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Structural and acoustical performance of recycled glass bead panels

Cited by 12 publications

References 18 publications

Acoustic wave propagation through eco-friendly porous panels at normal incidence

Acoustic wave propagation through eco-friendly porous panels at normal incidence

Vibrational and Acoustical Wave Propagation Through Fibreglass Plate for Different Boundary Conditions

Acoustic wave propagation through panels that are made of used tea bags

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