Where There’s Smoke There’s Failure
Here’s an excellent article about a terrifying reality: alternative smoke alarms are a massive failure for deaf and hard of hearing people. For example, only 27% of test subjects were awakened by strobe lights, the most common alternative to audible alarms in public environments. And a low frequency tone works better than the more common high frequency tone. The article is based on a report from the National Fire Protection Research Foundation.
Hearing Mojo: Sleeping Through Smoke Detector Alarm Can Get Hard-Of-Hearing Killed