Visual and Audible Alarms

Northern Virginia Resource Center for Deaf and Hard of Hearing Persons

Effectiveness varies from consumer to consumer, location to location

• Low frequency alarms are being explored

• Investigation also underway on use of different colored lights or other visual signaling – e.g. one for sheltering in place, one for evacuating the building

• New public safety vehicle system with different strobe lights, sirens at frequency better heard inside vehicles