How is a duress alarm activated?

The activation of a duress alarm is primarily achieved by pressing a hidden button. This design is intentional, as the duress alarm is a security measure used to signal for help discreetly and without drawing attention to the individual in distress. The hidden button allows an individual to activate the alarm during a situation where they may not be able to call for help safely or verbally indicate that they are in danger.

In contrast, shouting for help and breaking glass are not effective or secure methods of activating a duress alarm in a manner that maintains discretion. Opening a locked door also does not relate to the function of a duress alarm, as it does not serve the purpose of alerting security personnel without alerting potential threats. Thus, pressing a hidden button is the most effective and secure method to activate a duress alarm, emphasizing safety and confidentiality in emergency situations.