Sound level calibrator 4011

for sound level meters

The 4011 is a sound calibrator conforming to IEC 60942 class 1 and ANSI S1.40 for the calibration and the verification of microphones and sound level meters. It generates a sound pressure level of 114 dB at a frequency of 1000 Hz for the verification of the calibration of sound level meters. Each sound calibrator is supplied with an individual calibration certificate. The reference microphone and control circuit together maintain a constant sound pressure level inside the calibration coupler and automatically adjust for changes in load volume, temperature, atmospheric pressure and relative humidity. The sound calibrator can be used for 1/2“ and 1/4“ microphones.