Faber Acoustical Forum

Faber Acoustical Products for Mac => Electroacoustics Toolbox => Topic started by: noiseybw on April 16, 2008, 02:29:00 PM

Title: Cross Correlation Problem
Post by: noiseybw on April 16, 2008, 02:29:00 PM
The cross correlation display seems to normalize so that the largest positive peak is 1.0 and the display always goes from -1.0 to +1.0.  This is a problem if correlating signals that are out of phase (the peak negative correlation sails off the bottom of the scale).  It would be better to compute an actual correlation coefficient, which normalizes on the square root of the product of the autocorrelations at zero delay.  Then autoscale on the absolute value.
Title: Re: Cross Correlation Problem
Post by: FaberAST on April 16, 2008, 03:21:27 PM
You are correct, and your suggestion is a good one.

Thanks!