Characterization of Acoustical Properties of Felt and Carpet Made of Natural and Environmentally Friendly Materials

Journal article

Aygun, H. (2017). Characterization of Acoustical Properties of Felt and Carpet Made of Natural and Environmentally Friendly Materials. Open Journal of Acoustics. 7 (2), pp. 27-38. https://doi.org/10.4236/oja.2017.72004
AuthorsAygun, H.
Abstract

Sound absorbers including porous materials are used widely for noise control. The most widely-exploited and acknowledged absorption mechanism in porous materials is viscous friction due to relative motion between solid and fluid. Acoustical performance of woven (carpet) and nonwoven (felt) materials made of wool using a traditional technique was investigated. Absorption coefficient of felt was measured using standing wave tube method with and without an air cavity. Data were compared with predictions determined using the laws of Delany and Bazely. Very good agreement between data and predictions was observed. Sound absorption coefficients of both materials also were measured using an impedance gun technique over a wider frequency range. Absorption coefficient obtained using impedance gun method shows that the absorption coefficient of felt is higher than the absorption coefficient of carpet for mid and higher frequencies. Furthermore insertion loss (IL) of the felt was measured in a circular duct. It is found that felt can attenuate sound pressure level between 1 dB and 10 dB.

KeywordsAbsorption Coefficient, Insertion Loss, Carpet, Felt, Sound Propagation
Year2017
JournalOpen Journal of Acoustics
Journal citation7 (2), pp. 27-38
PublisherScientific research publishing
ISSN2162-5794
Digital Object Identifier (DOI)https://doi.org/10.4236/oja.2017.72004
Publication dates
Print16 Jun 2017
Publication process dates
Deposited30 Nov 2017
Accepted13 Jun 2017
Accepted author manuscript
License
File Access Level
Open
Permalink -

https://openresearch.lsbu.ac.uk/item/86z00

Download files

Accepted author manuscript
Acoustic properties of felt and carpet.pdf
License: CC BY 4.0
File access level: Open

  • 280
    total views
  • 843
    total downloads
  • 3
    views this month
  • 4
    downloads this month

Export as

Related outputs

Computational and theoretical investigation of acoustical and vibrational properties of rigid thin material
Aygun, H. (2024). Computational and theoretical investigation of acoustical and vibrational properties of rigid thin material. Acoustics. 6 (83-96). https://doi.org/10.3390/acoustics6010005
Spatial Fourier transform method to determine reflection and absorption coefficient of porous rigid materials applying Johnson-Champoux-Allard model
Aygun, H. (2023). Spatial Fourier transform method to determine reflection and absorption coefficient of porous rigid materials applying Johnson-Champoux-Allard model. https://www.ioa.org.uk/civicrm/event/info?reset=1&id=750. Winchester UK 16 - 17 Oct 2023 Institute of Acoustics.
Acoustic wave propagation through eco-friendly porous panels at normal incidence
Aygun, H., Gomez-Agustina, L. and Mundula, S. (2023). Acoustic wave propagation through eco-friendly porous panels at normal incidence. Building Acoustics. 30 (4), pp. 359-372. https://doi.org/10.1177/1351010X231202014
Non-Special Loudspeakers as Speech Test Sources in Natural Acoustics Speech Intelligibility Investigations
Gomez-Agustina, L., Aygun, H. and Mohan, L. (2023). Non-Special Loudspeakers as Speech Test Sources in Natural Acoustics Speech Intelligibility Investigations. Acoustics. 5 (3), pp. 619-630. https://doi.org/10.3390/acoustics5030038
Acoustic wave propagation through panels that are made of used tea bags
Mundula, S. and Aygun, H. (2023). Acoustic wave propagation through panels that are made of used tea bags. Inter-Noise 2022. Glasgow 21 - 24 Aug 2022 Institute of Noise Control Engineering (INCE). https://doi.org/10.3397/in_2022_0203
Acoustic and aesthetics: The effect of paint on fabric backed by a sound absorber
Diaz Mena, A.M. and Aygun, H. (2023). Acoustic and aesthetics: The effect of paint on fabric backed by a sound absorber. Inter-Noise 2022. Glasgow 21 - 24 Aug 2022 Institute of Noise Control Engineering (INCE). https://doi.org/10.3397/in_2022_0277
An audio-based vehicle classifier using convolutional neural network
Bakirci, E. and Aygun, H. (2023). An audio-based vehicle classifier using convolutional neural network. Inter-Noise 2022. Glasgow 21 - 24 Aug 2022 Institute of Noise Control Engineering (INCE). https://doi.org/10.3397/in_2022_0766
Experimental acoustic testing of alternative ventilation ducts
Zekic, S., Gomez-Agustina, L., Aygun, H. and Chaer, I. (2023). Experimental acoustic testing of alternative ventilation ducts. Institute of Noise Control Engineering (INCE). https://doi.org/10.3397/in_2022_0390
Vibroacoustic analysis of composite thin fiberglass plate
Aygun, H. (2021). Vibroacoustic analysis of composite thin fiberglass plate. http://www.spacustica.pt/euronoise2021/. Madeire Portugal 25 - 27 Oct 2021
Sound radiation from composite plates
Aygun, H. (2021). Sound radiation from composite plates. Acoustics 2021. Institute of Acoustics, Silbury Court, 406 Silbury Boulevard, Milton Keynes MK9 2AF 11 - 12 Oct 2021 The Institute of Acoustics.
Scattering Evaluation of Equivalent Surface Impedances of Acoustic Metamaterials in Large FDTD Volumes Using RLC Circuit Modelling
Ballestero, E., Hamilton, B., Jiménez, N., Romero-García, V., Groby, J., Aygun, H. and Dance, S. (2021). Scattering Evaluation of Equivalent Surface Impedances of Acoustic Metamaterials in Large FDTD Volumes Using RLC Circuit Modelling. Applied Sciences. 11 (17), p. e8084. https://doi.org/10.3390/app11178084
Metadiffusers for quasi-perfect and broadband sound diffusion
Ballestero, E., Jiménez, N., Groby, J., Aygun, H., Dance, S. and Romero-García, V. (2021). Metadiffusers for quasi-perfect and broadband sound diffusion. Applied Physics Letters. 119 (4), p. 044101. https://doi.org/10.1063/5.0053413
Scattering of acoustic waves in air and water filled 3D stereo-lithographical (STL) porous rigid materials
Aygun, H (2020). Scattering of acoustic waves in air and water filled 3D stereo-lithographical (STL) porous rigid materials. Inter-Noise 2020, Seoul. Seoul 23 - 26 Aug 2020
Measurement methods of acoustics properties for alternative ventilation ducts
Zekic, S, Gomez-Agustina, L, Aygun, H and Chaer, I (2020). Measurement methods of acoustics properties for alternative ventilation ducts. Inter Noise 2020. Seoul 23 - 26 Aug 2020 International Institute of Noise Control Engineering .
Structural and acoustical performance of recycled glass bead panels
Aygun, H. and McCann, F (2020). Structural and acoustical performance of recycled glass bead panels. Construction and Building Materials. 258, pp. 119581-119581. https://doi.org/10.1016/j.conbuildmat.2020.119581
The quality and reliability of the mechanical stethoscopes and Laser Doppler Vibrometer (LDV) to record tracheal sounds
Aygun, H. and Apolskis, A. (2020). The quality and reliability of the mechanical stethoscopes and Laser Doppler Vibrometer (LDV) to record tracheal sounds. Applied Acoustics. 161, p. 107159. https://doi.org/10.1016/j.apacoust.2019.107159
Experimental validation of deep-subwavelength by diffusion by acoustic metadiffusers
Dance, S., Ballestero, E., Aygun, H., Jimenez, N., Groby, J-P. and Romero-Garcia, V. (2019). Experimental validation of deep-subwavelength by diffusion by acoustic metadiffusers. Applied Physics Letters. 115 (8). https://doi.org/10.1063/1.5114877
A viscoelastic system for determining acoustical and mechanical parameters of the bone
Aygun, H. (2019). A viscoelastic system for determining acoustical and mechanical parameters of the bone. Applied Acoustics. 150, pp. 70-75. https://doi.org/10.1016/j.apacoust.2019.01.034
Determining mechanical parameters of the bone using a vibro-acoustic method
Aygun, H (2019). Determining mechanical parameters of the bone using a vibro-acoustic method. Acoustics 2019. Milton Keynes, UK 13 - 14 May 2019
Investigation of acoustical and structural parameters of recycled glass bead composite panels
Aygun, H and McCann, F (2019). Investigation of acoustical and structural parameters of recycled glass bead composite panels. Inter.Noise 2019 - the 48th International Congress and Exhibition on Noise Control Engineering. Madrid, Spain 17 - 21 Jun 2019
Tracheal Sound Acquisition Using Laser Doppler Vibrometer
Aygun, H. and Apolskis, A (2018). Tracheal Sound Acquisition Using Laser Doppler Vibrometer. ACOUSTICS 2018 - ACWSTEG 2018. City Hall, Cathay's Park, Cardiff 23 - 24 Apr 2018 London South Bank University.
Why research informed teaching (RIT) in acoustics education: How can we embed research in acoustics education to improve students' learning?
Aygun, H. (2017). Why research informed teaching (RIT) in acoustics education: How can we embed research in acoustics education to improve students' learning? 24th International Congress on Sound and Vibration. London, UK 23 - 27 Jul 2017 London South Bank University.
Investigation of acoustic performance of compressed wool carpets
Aygun, H. (2016). Investigation of acoustic performance of compressed wool carpets. 23rd International Congress on Sound and Vibration. Athens, Greece 10 - 14 Jul 2016 London South Bank University.
Sound propagation through bone tissue
Aygün, H., Barlow, C., Yule, L. and Liu, S.Y. (2015). Sound propagation through bone tissue. ACOUSTICS 2015. Harrogate, UK 15 - 15 Oct 2015 Institute of Acoustics.
Behaviour of ultrasonic waves in porous rigid materials: an anisotropic Biot-Attenborough model
Aygun, H. and Barlow, C (2015). Behaviour of ultrasonic waves in porous rigid materials: an anisotropic Biot-Attenborough model. Journal of Physics: Conference Series. 581, pp. 1-12. https://doi.org/10.1088/1742-6596/581/1/012006
Ultrasonic wave propagation through porous ceramics at different angles of propagation
Aygun, H. and Barlow, C (2014). Ultrasonic wave propagation through porous ceramics at different angles of propagation. Applied Acoustics. 88 (0), pp. 6-11. https://doi.org/10.1016/j.apacoust.2014.07.011
Behaviour of acoustic waves in a duct with Helmholtz resonator in presence of a temperature gradient
Aygun, H. and Rubini, P (2014). Behaviour of acoustic waves in a duct with Helmholtz resonator in presence of a temperature gradient. Institute of Acoustics 40th Anniversary Conference. NEC, Birmingham, UK 15 - 16 Oct 2014 http://toc.proceedings.com/24268webtoc.pdf Proceedings of the Institute of Acoustics Volume 36 Pt.3.
A Review of the State of Art in Applying Biot Theory to Acoustic Propagation through the Bone
Aygun, H., Attenborough, K and Postema, M (2014). A Review of the State of Art in Applying Biot Theory to Acoustic Propagation through the Bone. Open Access Library Journal. 1 (9), pp. 1-12. https://doi.org/10.4236/oalib.1100994.