Experimental Investigation of Sound-Absorbing Material of Different Surface Shapes on Noise Reduction Performance of an Acoustic Enclosure

Abstract

The control of transmission of airborne noise radiated from the cutting tools during machining is one of the challenging tasks in the factory workspace and industrial environment. The intense noise surroundings not only affect the worker's health psychologically but also suffer from hearing damage, high fatigue, and impaired efficiency at the workplace. Therefore, an adequate design of the cutting tool enclosure is essential from the acoustical point of view. The implementation of acoustic absorbing material inside the enclosure is an appropriate way for controlling the noise effectively. However, the effects of geometry and different shapes of absorbing materials are seldom studied. In the present paper, therefore, an experimental study is presented for investigating the influence of acoustic absorbing material of different surface shapes on the acoustical performance of an enclosure. The 1/3 octave analysis is performed to study the effect of various shapes of acoustic material in the different frequency bands. © 2021, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.