How is phase compensation calculated in sound intensity analyzers? 1

[mkoijn]

Does anyone know how the phase compensation features found in modern sound intensity analyzers are calculated? I'm using a home made intensity probe which has upto 10 degrees phase difference between the two microphones at very high frequencies when exposed to the same sound source. The way I propose to compensate for the phase difference between the mikes is to expose the mikes to the same sound source and save the phase difference between them as a text file, take the measurement, then export the cross phase plot and the cross magnitude plot as text files into a spreadsheet program (excel), then minus the phase difference obtained from my calibration procedure from the cross phase text file to obtain a compensated cross phase plot and then, from the compensated cross phase text file and the cross magnitude text file calculate the needed cross imaginary data.
Running simple sine wave text files with known phase differences through my spectrum analyzer, and then applying the above method in excel, it works. However I would be very grateful to know if anyone can see any holes in my method or if phase compensation features in professional intensity analyzers is calculated differently.

Many thanks in advance,

a finnigan

 

[GregLocock]

That sounds fine. It is exactly the method used in INTEN which was an old SDRC SI program.

I don't know how modern programs do it, maybe try the B&K website.

Cheers

Greg Locock