NEMA SBP 4:2015

This white paper addresses the need for and development of the low-frequency audible signal used in fire alarms, carbon monoxide (CO) alarms, and fire or CO alarm systems. It documents the signal's waking effectiveness for hearing-impaired people, school-age children, and the elderly. It also summarizes the voluntary national consensus requirements for the application, installation, location, and performance for these products when employing the low-frequency audible signal. Purpose The purpose of this white paper is to clear up confusion in the fire alarm industry related to application of the low-frequency audible alarm signal. It is ideally suited for installers, the fire service, building code officials, end users, fire protection engineers, and electrical engineers.