NC-74 Sound Calibrator 噪音校正器（噪音，分貝）

NC-74 Sound Calibrator

噪音校正器（噪音，分貝）

Compact and lightweight unit requires

no atmospheric pressure compensation

Compliant with IEC 60942:2003 class 1 and JIS C1515:2004 class 1

Allows calibration of 1-inch and 1/2-inch microphones

No need for atmospheric pressure compensation

Frequency 1 kHz, SPL 94 dB

 

Carefully insert the microphone all the way into the coupler

of the NC-74. Then simply turn the power on to apply a

constant sound pressure level to the diaphragm of the

microphone.

The NC-74 incorporates a sensor that detects atmospheric

pressure. Based on the information provided by the sensor,

the CPU controls the signal amplitude. This allows the

unit to always provide the correct output for achieving

constant sound pressure level, regardless of fluctuations

in atmospheric pressure.