Quote:
Originally Posted by vanman
Maybe they were testing the building's fire systems.
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Definitely must be.
Abstract: A system is disclosed that detects an optical alarm signal, such as a strobe light signal generated by a building alarm system.Upon detecting such a signal, the system generates a supplemental alert signal capable of alerting an individual who might not otherwise respond to the alarm condition, such as an individual who is asleep, hearing impaired, and/or sight impaired. The system may, for example, be implemented as a patient-worn device, a bedside unit, or a personal computer coupled to a light-sensing peripheral device. (end of abstract)