At which noise level do individuals typically start feeling stressed?

Individuals typically start feeling stressed at noise levels around 75 dB. At this level, sounds can become intrusive, leading to elevated anxiety and discomfort. Prolonged exposure to this intensity can interfere with concentration and communication, which are crucial for safe operations in aviation and other high-stakes environments. Even though general discomfort might begin at lower levels, significant stress and performance degradation are more pronounced starting at the 75 dB threshold. It's important to understand these noise levels in the context of human factors in aviation, where clear communication and focus are essential for safety.