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The AWA6021A/L sound calibrator uses acoustic negative feedback technology, resulting in highly stable sound pressure levels without the need for corrections to temperature and atmospheric pressure changes. It is available in 94 dB and 114 dB sound pressure levels, and is small, lightweight, stable, and easy to use. Its performance meets the technical requirements of IEC60942:2017 for Class 1 sound calibrators and can be used for sound pressure level calibration of Class 1 and Class 2 sound level meters.