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.
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)doi:10.4236/oja.2017.72004
Publication dates
Print16 Jun 2017
Publication process dates
Deposited30 Nov 2017
Accepted13 Jun 2017
Accepted author manuscript
License
CC BY 4.0
File Access Level
Open
Permalink -

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

  • 5
    total views
  • 26
    total downloads
  • 0
    views this month
  • 3
    downloads this month

Related outputs

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
Experimental validation of deep-subwavelength by diffsuion by acoustic metadiiffusers
Dance, S., Ballestero, E., Aygun, H., Jimenez, N., Groby, J-P. and Romero-Garcia, V. (2019). Experimental validation of deep-subwavelength by diffsuion by acoustic metadiiffusers. Applied Physics Letters. 115 (8).
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.
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.
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.
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.
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.