A Lightweight and Compact Acoustic Calibrator

The NC-75, that supersedes the NC-74, is a class 1 calibrator suitable for calibration of high-precision sound level meters. Being compact and lightweight the sound calibrator allows highly reliable and accurate measurement anywhere.

A reference microphone is integrated in the unit, which eliminates the need to compensate for differences in calibration sound pressure level caused by differences in the equivalent volume of various microphones.

Microphones made by Rion as well as microphones made by other manufacturers that meet the IEC 61094-4 size specifications are supported for calibration.

  • Detects atmospheric pressure and adjusts signal accordingly to always output a constant sound pressure level
  • Accepts 1 inch, 1/2 inch and 1/4 inch diameter microphones
  • Nominal sound pressure level: 94dB
  • Nominal frequency: 1kHz

Applicable Standards

  • IEC 60942 Class 1
  • JIS C1515 Class 1
  • Each product comes standard with a JCSS Calibration Certificate, demonstrating high quality.