It is recommended that
A) Alarms be as loud as possible to draw an operators attention
B) Alarms are 15-25 dB above masked thresholds ensuring they are unlikely to be missed.
C) Alarms be loud enough to startle an operator but not loud enough to cause hearing damage
D) Alarms are 5-10 dB above detection threshold

Question

Quizplus · Accepted Answer

While it may seem logical that alarms should be as loud as possible to draw an operator's attention, this can actually lead to fatigue and desensitization to the alarm over time. Research shows that alarms should be set 15-25 dB above the masked thresholds (the level of noise that's already present in the environment), ensuring they are unlikely to be missed without causing hearing damage or startling the operator unnecessarily. Therefore, Option B is the best choice.

It Is Recommended That