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The term "false alarm" may actually be semantically incorrect in some uses. For example, a residential burglar alarm could easily be triggered by the residents of a home accidentally. The alarm is not necessarily false – it was triggered by the expected event – but it is "false" in the sense that the police should not be alerted.
The false positive rate is calculated as the ratio between the number of negative events wrongly categorized as positive (false positives) and the total number of actual negative events (regardless of classification). The false positive rate (or "false alarm rate") usually refers to the expectancy of the false positive ratio.
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.
An airline spokesperson said an indicator light was later confirmed to be false. An American Airlines jet made an emergency landing Sunday after the crew reported a "possible electric issue."
An errant call about a sick astronaut startles listeners.
The large number of alarms, especially of false alarms, has led to several unintended outcomes. Some consequences are disruption in patient care, [10] desensitization to alarms, [11] anxiety in hospital staff and patients, [11] sleep deprivation and depressed immune systems, [11] misuse of monitor equipment including "work-arounds" such as turning down alarm volumes or adjusting device ...
This article originally appeared on Rochester Democrat and Chronicle: AI software triggers false alarm of guns at St. John Fisher University. Show comments. Advertisement. Advertisement.
Phantom vibration syndrome or phantom ringing syndrome is the perception that one's mobile phone is vibrating or ringing when it is not. Other terms for this concept include ringxiety (a portmanteau of ring and anxiety), fauxcellarm (a portmanteau of "faux" /foʊ/ meaning "fake" or "false" and "cellphone" and "alarm" pronounced similarly to "false alarm") and phonetom (a portmanteau of phone ...