Bio-based products are leading the way toward a more sustainable future. They areplaying a key role in combating climate change and global warming, which are primarilydriven by using fossil fuels. This study demonstrates the potential of Finola hempresidues as feedstock for acoustic insulation components to replace synthetic fibers.The use of these residue fibers improves the resource efficiency of the crop andcontributes to a circular economy. To enhance the fiber properties, Finola hemp residueswere combined with cottonized hemp, crossbred sheep wool and polylactic acid (PLA).Nonwovens were produced using needle punching and thermal bonding techniques.Extensive experiments revealed the correlation of fiber and fabric properties with theacoustic insulation properties of the nonwoven structures. The needle punched samplesconsisting of Finola hemp and cottonized hemp fibers showed the highest air flowresistances. Thus, a maximum sound absorption coefficient of 0.99 at 9150 Hz wasreached. The study highlights that the high sound absorption coefficients were achieveddue to the high density of the sample caused by a high proportion of short and finefibers and strong compression through the needle punching process. Moreover, a highnumber of layers was correlated with good sound absorption properties.