Soft-db I-Track User guide Manuale Utente Scaricare il pdf (Pagina 19)

It is strongly recommended to perform an amplitude calibration and a phase mismatch

compensation calibration prior to the measurement of the PI residual. Enabling phase mismatch

compensation increases the PI residual and the dynamic capability of the instrument.

Some PI Residual calibrators require a certain time to equilibrate the pressure in the calibration

chamber after the insertion of the microphones.

Microphone Spacer

The microphone separation is an important parameter in the sound intensity evaluation from the

pressure gradient. In order to provide precision measurement of sound intensity, the microphone

separation distance must be carefully selected in function of frequency range.

The input configuration allows defining the selected microphone spacer. It also provides a

reminder tool to select the appropriate spacer. If a single spacer doesn’t provide a bandwidth

which is large enough to appropriately evaluate the sound intensity over the whole frequency

range, the measurement must be repeated using different spacers and combined afterwards.

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Soft-db I-Track User guide Manuale Utente Pagina 19