Basic FAQ for FFT Analyzer

In sound measurement, due to factors such as the sensitivity value of the microphone, the gain of the preamp (insertion loss), and the gain of the microphone amplifier, as well as the fact that the reference value is not 1EU (the reference sound pressure level is 20μPa), the FFT analyzer is usually calibrated using calibration signals (AC signals) from an acoustic calibrator. That is, the AC signal corresponding to the specified sound pressure level generated by the acoustic calibrator (usually a sine wave) is read for its voltage level value by the FFT analyzer, and by converting that value to the specified sound pressure level value, any peak value or overall value of the power spectrum can be directly read in sound pressure level (unit: dB).

For specific operating procedures, please refer to the related items.

	Simple calibration method between DS-0221 and sound level meter (FFT Analyzer FAQ) DS-2000 Simple Operating Procedure Manual "Noise Measurement Edition" (PDF) (FFT Analyzer FAQ) DS-2000 Simple Operating Manual "MI-1233 Microphone and MI-3100 Preamplifier Unit calibration Method" (PDF) (FFT Analyzer FAQ) CF-7200 Simple Operation Manual "Noise Analysis Procedure" (PDF) (FFT Analyzer FAQ)