how to get normalizede power spectrum or amplitude spectrum in laview?

[winnie11]

Hi, I am recently analyze and compare the power spectrum of different sound signal to different various sound. In order to avoid the effect of amplitude(which changes at different condition,even for the same sound signal), I want to use the normalized power spectrum or normalized amplitude spectrum by deviding the power of each frequency components by total power of the sound signal at that moment. So how can I achieve this in labview?

Thanks in advance:)

[altenbach · Accepted solution]

What is the datatype? If it is an array, you can simply divide by the total power. This value might be independently known, or you could simply divide by the sum of all array elements (use add array elements)..

[winnie11]

yes, I use array. This method is good. Thank you.