Sailesh, R.Doddamani, M.Mailan Chinnapandi, L.B.Yuvaraj, L.Pitchaimani, J.2026-02-042024Wood Material Science and Engineering, 2024, 19, 3, pp. 615-62617480272https://doi.org/10.1080/17480272.2023.2286446https://idr.nitk.ac.in/handle/123456789/21474The effect of wood fibre reinforcement on acoustic properties of 3D printed poly lactic acid samples having varying cross-section perforation and functionally graded spherical perforations is presented. Acoustic characteristics like sound absorption as well as transmission loss are obtained using an impedance tube setup. Results revealed the benefits due to the addition of wood fibres in PLA improved samples’ sound transmission loss characteristics significantly. The sound absorption curve peaks shifted to low-frequency regions which are favourable to living beings. The material can be used in acoustic insulation for structural and transportation applications, especially where eco-friendliness and aesthetics are of major concern. © 2023 Informa UK Limited, trading as Taylor & Francis Group.3D printingAcoustic wave absorptionArchitectural acousticsLactic acidMaterials handlingReinforcementSound insulating materialsWave transmission3-D printing3D-printingAbsorption lossFG perforationPLASA coefficientSound absorptionSound transmissionTapered perforationWoodfiberAcoustic impedanceCharacteristicsLactic AcidMaterials HandlingPerforationsSound AbsorptionTransmissionWood