What characteristic is associated with noise as a hazard in pneumatic systems?

In pneumatic systems, excessive noise is a significant characteristic that poses a hazard. This noise often arises from the operation of various components such as compressors, valves, and pneumatic tools. Prolonged exposure to excessive noise levels can lead to various health issues for workers, including hearing loss, increased stress levels, and diminished job performance. It's crucial for workplaces utilizing pneumatic systems to monitor noise levels and implement noise control measures to protect workers' hearing and overall well-being.

High pressure, while relevant to pneumatic systems, primarily relates to the risk of mechanical failure or injury from sudden pressure release rather than being a characteristic of noise itself. Low visibility is a different concern that deals with safety in terms of physical sight issues rather than noise levels. An electrical hazard pertains to risks associated with electric shock or equipment, which is not directly connected to pneumatic systems that primarily operate on compressed air.