Experimental characterization of the noise generation mechanism of percussion drill rods
An experimental approach is used to characterize the vibroacoustic behaviour of percussion drill steel rods under real operating conditions and laboratory controlled conditions. A laboratory test fixture presenting representative boundary conditions is used. The relative contribution of longitudinal and flexural vibration to the noise generation is discussed. By comparing the laboratory and the in situ measurements, it is shown that the main noise source of percussion drill rods are the
flexural waves. However, the noise reduction potential, by reducing the bending vibration, is limited by the radiation of axial waves.
Vibroacoustics, Noise control, Percussion drills.