Product Data Outdoor Microphones Nor1216 for permanent installations Nor1217 for semi-permanent installations • Outdoor microphone for community and aircraft noise. • Horizontal or vertical reference direction set by external frequency correction. • Fulfils IEC 60651, IEC 61672 class 1 and ANSI S1.4 type 1 (when used with Sound Analyser Nor140). • Protection class IP 55 (dust and water). • Easy to calibrate with a normal ½” sound calibrator. • Powered from the sound level meter. • Microphone verification by SysCheck facility. • Low self-noise – typically below 18 dB, A-weighted. • Delivered with individual calibration certificate. • Build in heating for enhanced weather protection (Nor1216 only) • Directly powered and supported by Sound Analyser Nor140 (build in selectable frequency correction networks, heater supply and SysCheck signal generator) Innovative sound instrumentatiton www.norsonic.com

Nor1216 / Nor1217 The Outdoor Microphones Nor1216 and Nor1217 are high quality measurement microphones for all-weather conditions sharing the same acoustical and weather protection design. The Nor1216 is mainly designed for permanent outdoor applications due to the build in heater, whereas the Nor1217 is designed for semi-permanent application requiring low power. The Nor1217 uses the standard preamplifier and microphone from the Nor140, making it a very cost effective solution. The Nor1216 has a special preamplifier with a build in electrical heater resistor which further enhances the weather...

Frequency response Both Nor1216 and Nor1217 satisfy Class 1 specification requirements according to IEC61672-1 and related national standards when used with Nor140 and the correction network automatically selected when this microphones are selected. The diagram below shows the typical frequency response of the microphone along the vertical and the horizontal reference direction before correction is applied. The Outdoor Microphone may be calibrated with a normal sound calibrator suitable for ½” working standard microphones (WS2) without the need for extra accessories. Access to the microphone...

SysCheck verification For verification of proper operation, the microphone is equipped with a system check facility (SysCheck), where an electrical signal applied on one of the terminals are returned after passing through the complete signal chain, thus verifying proper operation of the microphone cartridge, preamplifier and microphone cable. It is a robust and simple method for verifying a microphone system. Typical self noise of the microphone system when the microphone is substituted by a capacitor with similar capacitance as the microphone. Note that the acoustical self-noise for a real microphone...