Thomas P. Hammerberg, SET, CFPS, is president/executive director of the Automatic Fire Alarm Association Inc., Jasper, Ga. He serves on a number of NFPA committees including the NFPA 72 Technical Correlating Committee and the Protected Premises Technical Committee.
Until the mid 1980s, bells were the common notification appliance for fire alarm systems. They were loud and for the most part, could be heard better than today’s horns.As fire
