Hearing a smoke alarm during an afternoon test does not show that the same person will wake to it at night. Hearing aids may be removed, doors closed and the alert farther away. An accessible warning system needs to work in those real conditions.
The National Fire Protection Association’s smoke-alarm guidance describes visual alerts and compatible pillow or bed shakers for people who are deaf or hard of hearing. It also advises selecting equipment listed by a qualified testing laboratory.
Begin with the person and the building
Discuss which signals the person can reliably notice while awake and asleep. A flashing light, a vibrating device and a suitable audible alert have different roles. Do not assume that one accessory will suit every hearing level, bedroom or alarm system.
Record the existing alarm models and ask a competent installer, building manager or local fire service about compatible options. In a shared building, a personal device may need to respond to the building system rather than only to a standalone bedroom alarm.
Make the test meaningful
Follow the manufacturer’s approved test procedure. Confirm that the intended alert activates, that its power arrangements are understood and that the household knows what to do when it operates. Never create smoke or disable other alarms to improvise a test.
Include a change check: moving the bed, replacing an alarm or rearranging a room may affect the setup. Keep the instructions somewhere the household can find them, together with a record of servicing and battery requirements.
The alert is only the first step. Agree an escape plan that accounts for mobility and communication needs. A device should support the person’s ability to respond; it should not depend on someone else happening to be awake and nearby.