alarm signal

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alarm signal

[ə′lärm ‚sig·nəl]
(electronics)
The international radiotelegraph alarm signal transmitted to actuate automatic devices that sound an alarm indicating that a distress message is about to be broadcast.
References in periodicals archive ?
Stuart Gee huddersfield examiner Fire chiefs get tough over false alarm calls This doesn't appear to be about pranksters but about businesses with alarms which are over keen.
Mimicked alarm calls of the babblers or of another bird distracted the babblers for longer than plain drongo alarms.
The researchers found that the vigilance of sportive lemurs significantly increased after they heard playbacks of the alarm calls of the crested coua and the Madagascar magpie-robin.
The researchers have monitored the behavior of 33 different chimpanzees, who saw one of three snake models and found that alarm calls were produced more when the caller was with group members who had either not seen the snake or had not been present when alarm calls were emitted.
For example, Marietta, George reported in March 2010 a reduction of alarm calls by 65 percent and an overall drop in crime by 19 percent.
Knowsley North MP George Howarth was one of the lowest claimants at around pounds 9,000, but spent pounds 35 of taxpayers' money on just being woken up by alarm calls.
Alarm calls may be particularly important communications, as they may allow birds to warn con-specifics and escape predation, and potentially have an immediate effect on fitness (Klump and Shalter 1984).
Last year saw almost 1,800 false alarm calls to the fire service from Birmingham alone, a new report has shown.
After discovering that the city wasted huge amounts of scarce police resources responding to personal burglar alarms set off by the wind, by household pets or for no apparent reason, officials declared their intent to stop answering unverified burglar alarm calls.
He wondered if alarm calls might be even more specific--if prairie dogs can describe what they see, identifying particular coyotes or humans.
Andrews in Scotland, heard the monkeys string two alarm calls into a combined sound with a different meaning, as if forming a word.
But despite coping well with the presenter's mickey-taking, the early alarm calls weren't as easy to adjust to.