So when [Martin] purchased a battery-powered smoke detector and rigged it up to notify him exactly when the piezo siren is activated, the evolution of the automatic fire alarm continued into the ...

A voice warning precedes the siren, so you can stop it from ... of the sensors and how well they handled non-fire situations. Did the alarm make a distinction between cigar smoke, an extra-long ...

"I could hear the fire siren very clearly from school," he said ... "So, it could be an alarm at the hospital, which is a serious thing, or it could be a wash-away of petrol from a small car ...