Sound Calibrator Lutron SC-943 94dB Calibration Sound Calibrator Lutron SC-943 is a reliable sound level calibrator designed for accurate calibration of sound measuring instruments. This professional sound level meter calibrator produces a stable 94 dB output at 125 Hz, ensuring precise verification of sound meters. It works as an efficient acoustic calibrator and microphone calibrator compatible with 1-inch and 1/2-inch microphones. The device is widely used in laboratories, environmental monitoring, and industrial noise testing where accurate sound level meter calibrator performance is required. Application: Environmental Monitoring, Industrial Manufacturing, Construction, Automotive, Aerospace, Acoustic Laboratories, Electronics Testing, Occupational Health & Safety.