SPL-level only

No calibration is needed for this option. L_ref is assumed to be 0 dB in all frequency bands, which means no correction is made on the level calculated from the primary impulse response. This can be used for instance if the source level is unknown or of no interest, but the level difference at various measurement positions shall be compared. To find the absolute level in SPL, the input must be calibrated (from Measurement->Calibration...).

In this case no other options are available in the dialog. But for standard strength measurements, do not select this option.