This is an interesting device - it hears a fire alarm sounding - then
it shakes the bed and emits a low frequency alarm noise - this will
wake older people better - Peter Sz


Building A Better Smoke Alarm
North American Press Syndicate - New York,NY,USA
The Lifetone HLTM Bedside Fire Alarm and Clock is the only UL-Listed fire
alarm available that uses a 520 Hz square-wave technology and a bed shaker.
...
<http://www.napsnet.com/articles/61275.html>
See all stories on this topic:
<http://news.google.com/news?hl=en&ncl=http://www.napsnet.com/articles/61275.html>

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