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Advances in Acoustics and Vibration
Table of Contents
Special Issues
Advances in Acoustics and Vibration
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2018
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Article
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Tab 2
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Research Article
Low-Frequency Noise Reduction by Earmuffs with Flax Fibre-Reinforced Polypropylene Ear Cups
Table 2
Fibre volume fraction and number of fibre layers in each composite ear cup.
Fabric
Number of fibre layers
Fibre volume fraction [%]
Nonwoven mat
4
27
twill weave mat
3
27
hopsack weave mat
3
33