Nor1216/1217/1218 Outdoor Microphones Nor1216 outdoor microphone for permanent installations Nor1217/1218 outdoor microphones for semi-permanent installations Outdoor microphone for community and aircraft noise. Fulfils IEC 60651, IEC 61672 class 1 and ANSI S1.4 type 1. Protection class IP 55 (dust and water). Easy to calibrate with a normal ½” sound calibrator. The outdoor microphones Nor1216, Nor1217 [...]