What can cause ruptured eardrums in relation to compressor operation?

Ruptured eardrums can occur when pressure levels exceed certain thresholds, which is precisely why the correct choice highlights pressure levels exceeding 40 PSI. When compressors operate at high pressures, they can generate air currents and sound waves that might create conditions leading to barotrauma—an injury caused by a rapid change in pressure—affecting the eardrum. This is particularly relevant for individuals working in environments involving compressed air or gases where maintaining a safe pressure is crucial for employee safety.

While exposure to high RPMs, noise levels beyond 90 decibels, and improper ear protection can pose risks to hearing and overall auditory health, they do not directly relate to the physical rupture of the eardrum in the context of compressor operation. Excessive noise can lead to hearing loss over time, and failure to use ear protection increases the risk of hearing damage, but they are not the immediate cause of a ruptured eardrum related to pressure changes from a compressor. Thus, understanding the direct impact of pressure on ear health is essential.