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What is the distortion figure in calibration?

April 26, 2017calibration distortion figure

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What is the distortion figure in calibration?

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The distortion figure is calculated by comparing the energy received during complete cycles of the calibration tone with the theoretical energy that should be received from a pure sine wave of the same frequency. On the assumption that the calibrator produces a pure sine wave, it is an indication of how well the sound card is handling the signal.