Published Paper Details:

This study aims to investigate the sound characteristics exhibited during the no load mechanical run test of a gearbox and develop an effective acoustic hood to mitigate the resulting noise. The experimental setup involves subjecting the gearbox to a no load mechanical run test, which simulates its normal operating conditions without any external load. During the test, sound pressure levels are recorded using Bruel and Kjaer meter at three different locations surrounding the gear. The recorded data is then analyzed by dividing it into octave bands to determine the distribution of sound energy across different frequency ranges. The analysis indicates peak sound energy levels at specific frequencies and provides valuable information of designing an effective noise reduction solution Based on the findings, an acoustic hood is developed to attenuate the sound produced by the device and effect of the acoustic hood will be evaluated. The developed acoustic hood successfully reduces the sound pressure levels in the identified frequency ranges. The results demonstrate the importance of frequency-specific noise reduction measures in improving the acoustic performance of the device.