Transfer function in proportional frequency bands

[ankit]

Hello All

I have posted the same question earlier also but didn't get any response. I was wondering if I explained my problem well or not. So here one more try:

Trying to calculate the frequency response function in proportional frequency bands ( 1, 1/3, 1/6, 1/24 octave). Again I am not trying to calculate the sound pressure levels. The calculation has to be done for frequency response function (giving magnitude and phase) between two channels according to those frequency bands. the only difference from the standard FRF function in the sound and vibration toolkit is that in this case the magnitude and phase values are needed for a particular frequency band rather than a discrete frequency.

Any suggestions

Thanks

Ankit

[BrowningG]

Hello Ankit,

It looks like you have posted this question in response to a similar previous post you created.  To make it easier on anyone who is looking for this answer or looking to reply, I have responded to this question in your earlier post.  Please refer to that for my response. 

Message Edited by BrowningG on 06-11-2008 06:29 PM

[ankit]

I am posting it here also if anyone is trying to deal with the same problem atleast there is going to be one opinion outside in the NI world.

Hello Browning

I am trying to write an application for the purpose of calculating the sound absorption coefficient of materials in an impedance tube. I wanted to if the data (absorption coefficient )has to be reported in Octave bands (1, 1/3, 1/.6 or any other required one) then is it possible to get the transfer function's magnitude and phase for each bands. But now after doing a little research I think it is not possible conceptually to get phase for a band. But I am not a GURU in this , I may be wrong but for now wher I stand I think one cannot calculate the phase for a band.

Octave bands are defined for averaging SPL's not for phase.

Thanks for taking interest in my post.

Ankit