Rion NC-74 Sound Calibrator
The NC-74 is a Class 1 acoustic calibrator for 1“ or ½” microphones using a supplied adaptor. The performance of the NC-74 is suitable for calibration of high-precision sound level meters.
Allows calibration of 1” and ½” microphones
Output level of 94 dB SPL at 1000Hz
No need for atmospheric pressure compensation