Normalising measurements taken with different dBFS levels

[Asx77]

Hello, This is my first time posting here so apologies if this is in the wrong place.

I’ve just spent a long time taking sweeps. As I’ve moved the mic closer to a subwoofer I’ve started getting clipping but I’ve not finished taking measurements. I’d really like to avoid starting over.

I know I can reduce the sweep dBFS level on the ‘Make a measurement’ pop-up. Can I reduce the output level here and carry on and then somehow normalise all my measurements later?

The measurements I’m taking need to be exported as text files to use with MSO so they need to be permanently manipulated before exporting.

Thank you in advance.

 

[John Mulcahy]

You can reduce the sweep level and later add an SPL offset to the measurements to allow for the reduction.

 

[Asx77]

You can reduce the sweep level and later add an SPL offset to the measurements to allow for the reduction.

Hi John, thanks so much for the quick reply and since this is my first contact, thank you for making this brilliant program.

Presumably then when I export the measurements to MSO, it would be as if they had all been made with the same SPL level?

 

[John Mulcahy]

Adding the offset will compensate for the sweep level change (e.g. if you drop the sweep level 10 dB, add a 10 dB SPL offset). That will then be equivalent to all the measurements having been made at the same sweep level. That assumes what gets exported to MSO is the SPL & phase data.

 

[Asx77]

Adding the offset will compensate for the sweep level change (e.g. if you drop the sweep level 10 dB, add a 10 dB SPL offset). That will then be equivalent to all the measurements having been made at the same sweep level. That assumes what gets exported to MSO is the SPL & phase data.

Great! Thanks again.