RION NC-75 Sound Calibrator | IEC 60942 Class 1, 94 dB / 1000 Hz, 1-inch and 1/2-inch microphones, 2 × AA 50 h or more

RION NC-75 Sound Calibrator: 94 dB / 1 kHz, Class 1

Overview

The NC-75 is a RION sound calibrator that outputs 94 dB at 1000 Hz for on-site calibration of sound level meters and measurement microphones. A built-in reference microphone provides feedback control, so no atmospheric pressure correction is needed, and it ships with a JCSS calibration certificate. It has a single output level of 94 dB only.

Key Specifications

• Standards: IEC 60942:2017 Class 1, ANSI/ASA S1.40 Class 1, JIS C 1515 Class 1
• Output: 94 dB (±0.20 dB); 1000 Hz (±0.1%)
• Compatible microphones: 1-inch; 1/2-inch (adapter supplied); 1/4-inch requires the optional NC-75-S11
• Power and weight: 2 × AA, 50 h or more continuous; approx. 200 g

Applications

• On-site calibration of sound level meters before and after measurement.

Specifications per the RION product page and NC-75 catalog (retrieved 2026-10-21).