What is a bed shaker commonly used for in alarm systems?

A bed shaker is specifically designed to alert individuals who are hearing-impaired by providing a tactile response rather than an audible one. It is commonly integrated into alarm systems, particularly in warnings for fire or security breaches. When activated, the bed shaker produces vibrations that can be felt through the mattress, ensuring that those who may not hear audible alarms are still alerted to a potential emergency situation. This feature is crucial in enhancing safety and ensuring that all individuals receive adequate notice of alarms, regardless of their hearing ability.