Nor1252 Class 2 sound calibrator
CA 1/4/2 Microphone Calibration Adapter - iSEMcon_US
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4231 Sound Calibrator - Durham Instruments
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Sound Calibrator Nor1256 | Norsonic
Class 2 114 dB Sound Level Calibrator for Noise Dosimeters and Occupational Sound Level Meters
Microphone Comparison Calibration - YouTube
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Measurement Mic Calibrator | Reverb
SC-1 Microphone Calibrator from ISEMcon – Rational Acoustics
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Portable Microphone Calibration Kits
G.R.A.S. Microphone Calibrators | VIacoustics
Sound Calibrator | B&K Type 4231 | Brüel & Kjær
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CEM SC-05 Industrial Sound Level Meter Calibrator 94 & 114 dB IEC 942 – Industrial-Meters.com
