What is a duress alarm commonly referred to as?

A duress alarm is commonly referred to as a panic button because its primary function is to provide a quick and discreet means for an individual to signal the need for immediate assistance in a threatening situation. When activated, a panic button alerts security personnel or law enforcement to a potential emergency, often without the perpetrator being aware that the alert has been triggered.

This terminology emphasizes the urgency and severity of the situations in which these alarms are used, typically related to personal safety or security threats. Understanding the specific nomenclature associated with security systems is essential for effective communication and response in protective environments. The other options do not accurately capture the intent or function of a duress alarm as clearly as "panic button" does, as it specifically conveys the action of alerting help in a moment of panic or fear.