• Fulfils IEC 60651, IEC 61672 class 1 and ANSI S1.4 type 1 (frequency correction applied).
  • Protection class IP 55 (dust and water).
  • Easy to calibrate with a normal ½” sound calibrator.
  • Microphone verification by SysCheck facility.
  • Low self noise – typically below 17 dB, A-weighted.
  • Delivered with individually calibration certification.
  • Built in heating for enhanced weather protection.
  • Directly powered and supported by Nor140, Nor145 and Nor150 (built in selectable frequency correction networks, heater supply and SysCheck signal generator).
  • Type approved by PTB, Germany.


  • IEC 60651
  • IEC 61672
  • ANSI S1.4



Acoustic performance: IEC 60651, IEC 61672 class 1 and ANSI S1.4 type 1 (frequency correction applied) with a suitable instrument (Nor140/Nor150).
Max sound pressure level: >140 dB peak  dependent on supply voltage.
Microphone cartridge: Nor1227 or Nor1225 (1/2” 50 mV/Pa)
Polarization voltage: 0 volt (Nor1227) 200V (Nor1225)
Inherent noise: < 17 dB A-weighted
Reference direction: Vertical or horizontal dependent on the applied frequency correction
Ingress Protection Category: IP55 according to IEC 60529.
Supply voltage: ±14 volt to ±16 volt
Current consumption: 18mA incl. heating.
Connector: 7 pin Lemo type 1B male
Temperature range: -40ºC to +85ºC
Height: 375 mm / 14.8”(1” pipe mounting), 450 mm / 17,7” with tripod adaptor
Diameter: Approx 80 mm / 3.1” (with windshield)
Weight: Approx 300 g (with preamp microphone)
Mounting thread: Standard 1” pipe threads according to ISO 228. When using the tripod adapter: 3/8” UNC.



Product range catalogue

  • Product range catalogue -

    Norsonic_productrange_2024-2025.pdf (0.01GB)
Technical note

Nor4576 additional large windscreen for Nor1216 / Nor1217 / Nor1218

  • Nor4576 Additional large windscreen for Nor1216 / Nor1217 / Nor1218 -

    TN-Nor4576-large-windscreen-March-2024.pdf (523.99KB)


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