Noise Reduction of circular Saw Blades using Vibroacoustic Metamaterial

The presented work addresses a modification of a circular saw blade with a vibroacoustic metamaterial structure. The sound emitted by a saw is mainly due to the structural behavior of the circular saw blade, that is excited by the sawing process. A suitable and easy integrable vibroacoustic metamaterial is elaborated and a numerical stop band prediction is performed. Validation measurements are carried out in terms of structural dynamics and acoustic emission in the non-rotating state. The stop band occurs in the frequency range of approximately 2600 – 3700 Hz.