Search results
Results from the WOW.Com Content Network
Older models of PASS devices required manual arming by firefighters prior to entering a dangerous environment. The unit was equipped with a key which, when removed, armed the unit. This key was left outside the hazard area with an entry control officer. When the unit activated, it could only be switched off by inserting this key.
SimpliSafe also integrated with Amazon Alexa in 2018. Alexa users are able to check their system status with voice commands, as well as arm — but not disarm — their system. [36] On Sep 19, 2018, SimpliSafe integrated with Google Assistant. As with Alexa, SimpliSafe users can check their system status or arm their system with voice commands ...
However, in most fielded systems, unwanted clutter and interference sources mean that the noise level changes both spatially and temporally. In this case, a changing threshold can be used, where the threshold level is raised and lowered to maintain a constant probability of false alarm. This is known as constant false alarm rate (CFAR) detection.
In many municipalities across the United States, policies have been adopted to fine home and business owners for multiple false alarm activations from their security system. If multiple false alarms from the same property persist, that property could be added to a "no response" list, which prevents police dispatch to the property except in the ...
The term "false alarm" is actually a misnomer, and is regularly replaced by the term "nuisance alarm". When a sensor operates, it is hardly false [opinion], and it is usually a true indication of the present state of the sensor. A more appropriate term is nuisance, indicating that the alarm activation is inconvenient, annoying, or vexatious.
In addition, false alarms may acclimatise people to ignore alarm signals, and thus possibly to ignore an actual emergency: Aesop's fable of The Boy Who Cried Wolf exemplifies this problem. A false alarm is one of the most significant issues with conventional alarm systems. They can be triggered for several reasons, such as the movement of pets ...
In telecommunications, the term alarm sensor has the following meanings: . In communications systems, a device that can sense an abnormal condition within the system and provide a signal indicating the presence or nature of the abnormality to either a local or remote alarm indicator, and (b) may detect events ranging from a simple contact opening or closure to a time-phased automatic shutdown ...
Holdup alarms are alarms that require a person under duress [1]: ”someone in the room causing distress” to covertly trigger the alarm to summon the proper authorities. These types of alarms are most commonly found in retail establishments and financial institutions, but are sometimes an integrated feature of home burglar alarms .