The Murray Bridge Hearing Services Friendship Group meets on a monthly basis. Enjoy great friendships while learning skills to manage your hearing loss. Specialised Smoke Alarm Scheme; The specialised smoke alarm system has an alarm on the ceiling near the bedroom, an alerter unit near the bed-head with a flashing light, and a small vibrating disc under the fitted sheet to help awaken the person. People who are eligible to receive a specialised smoke alarm, including installation, at no cost, need to contact the Smoke Alarm Project office based at Hearing Services to receive an application