Blended sensor forms generate complete safety. Blend optical smoke alarms for living parts with heat alarms for kitchens, all connected via radio indicators for unified fire detection. In the event the occupant incorporates a Listening to impairment there are actually fire detection systems for the deaf and hard of Listening https://www.thesafetycentre.co.uk/blog/ems-wireless-firecell-systems-from-the-safety-centre/