Which of the following is a health risk associated with high noise levels in the workplace?

High noise levels in the workplace can lead to mental fatigue as a significant health risk. Continuous exposure to loud environments often creates a state of constant distraction and sensory overload, making it difficult for employees to concentrate on their tasks. This persistent strain can diminish cognitive functions, impair decision-making abilities, and lead to overall fatigue. Mental fatigue not only affects individual productivity and quality of work but can also lead to stress and decreased job satisfaction.

In contrast, the other options do not accurately reflect the consequences of high noise levels. Improved cardiovascular health suggests a positive effect that high noise exposure does not have; noise pollution typically has adverse effects on cardiovascular well-being. Similarly, reduced workplace injuries and increased flexibility imply enhancements in safety or physical capability, which are unlikely in a noisy environment that hinders communication and awareness, potentially raising the risk of accidents and injuries instead.