medical alarms

https://hotel-wiki.win/index.php/Why_Medical_Alarms_Are_Becoming_Essential_for_Independent_Seniors

Medical alarms can be jarring, but they're life-saving cues in hospitals and homes. They chirp for low battery, alert for a disconnected sensor, or escalate into a piercing sequence when a patient needs help. Hearing one often means a nurse or caregiver will arrive in seconds.