The two types of technologies typically combined to prevent false alarms are _____.

The combination of active and passive technologies is essential in reducing false alarms in intrusion detection systems. Active technologies typically involve sensors that require some type of stimulation to detect an intrusion, such as motion detectors or laser beams. These systems actively monitor for changes in the environment, generating alerts based on specific criteria, which can sometimes result in false alarms due to environmental factors like pets or foliage movement.

On the other hand, passive technologies rely on existing environmental conditions to detect intrusions. They do not generate alerts based on active monitoring; instead, they sense disturbances such as heat emitted by a human body or changes in sound patterns.

By integrating both active and passive technologies, systems can leverage their unique strengths. Active systems can provide immediate alerts, while passive systems can help confirm the intrusion by filtering out signals that don’t align with expected patterns. This combined approach enhances overall accuracy and reliability, thereby significantly reducing the likelihood of false alarms. This synergy is key to creating more intelligent intrusion detection systems that minimize unnecessary disruptions and improve the user experience.