Mining dump truck noise sources and mitigation approaches

In order to reduce noise-induced hearing loss from work-related noise exposure, mine workers, union representatives, mine managers, equipment manufacturers must work in partnership to successfully construct and implement new and better noise controls. On new machines, cabin noise levels are not normally a problem. Insulation around engines and fans greatly reduces noise and sound-proofing of the cab can keep operator exposure well below 85 dB(A). In other words, over time, exposure to noise levels at or above 85 decibels can lead to permanent hearing loss. However, the benefits of soundproofing will be lost if windows and doors are not kept closed and low noise output air-conditioning units might be needed. This article is concerned with the main sources of noise in dump trucks used for mining application and also the noise reduction methodologies.