Sound Absorption of Tufted Carpets Produced from Coarse Wool of Mountain Sheep

Coarse wool from Polish mountain sheep, often treated as a useless by-product of sheep husbandry, was used to produce pile carpets with tufting technique. Raw wool was used in the small-scale spinning mill to spin prototype rug yarns, which were then used for the production of carpets. The carpets w...

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Bibliographic Details
Published in:Journal of natural fibers 2023-11, Vol.20 (2)
Main Authors: Broda, Jan, Kobiela-Mendrek, Katarzyna, Bączek, Marcin, Rom, Monika, Espelien, Ingvild
Format: Article
Language:English
Subjects:
Absorption
Absorptivity
Acceptable noise levels
Acoustic insulation
Acoustic properties
Animal husbandry
carpet
Carpets
Fibers
Frequency ranges
Mountain sheep
Mountains
Parameters
Sheep
Sheep wool
sound absorption
Sound transmission
Transmission loss
tufting
Wool
Yarn
Yarns
传输损耗
吸声
地毯
声学特性
簇绒
纱线
羊毛
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Summary:Coarse wool from Polish mountain sheep, often treated as a useless by-product of sheep husbandry, was used to produce pile carpets with tufting technique. Raw wool was used in the small-scale spinning mill to spin prototype rug yarns, which were then used for the production of carpets. The carpets with cut and loop piles of two different heights and densities were manufactured. During examinations, the basic parameters of raw wool, yarns, and tufted fabrics were determined. Then, the soundproofing properties of carpets were analyzed. To characterize the acoustic properties of the carpets, the sound absorption coefficient and transmission loss were measured. The measurements were carried out in one-third octave bands in the frequency range of 80-5000 Hz using the impedance tube method. It was stated that the wool of Polish mountain sheep is coarse, highly differentiated both in thickness and length and contains a significant content of medullated fibers and kemp. Despite its poor characteristics, the wool can be used for the production of rag yarns suitable for the production of pile carpets with tufting technique. The carpets possess acceptable sound absorbing capacity comparable to other similar products obtained from other wool types, which is dependent on both pile types and their parameters. The carpets exhibit low transmission loss, which is influenced, to a lesser extent, by the change in the parameters of the pile layer.
ISSN:1544-0478
1544-046X
DOI:10.1080/15440478.2023.2246103