Can you describe the spectral or temporal characteristics of the "audio pressure
fluctuation" and "fluid turbulent pressure fluctuation"?
Hugh
--- On Wed, 6/9/10, e...@uq.edu.au wrote:
From: e...@uq.edu.au
Subject: [audiodsp] Hydrophone - turbulence measurements
To: a...
Date: Wednesday, June 9, 2010, 12:20 AM
Hi all,
I have some wave (.wav) files from measurements using a hydrophone in an
agitated tank. From a FFT I can see peaks at the impeller frequency (1000rpm ~
17 Hz) and its harmonics.
However, I would like to separate the "audio pressure fluctuation" from the
"fluid turbulent pressure fluctuation". Is it possible? Is there any kind of
filter I should use?
Extra information: I am processing it using LabView. My original signal are
recorded in a voice recorder from an amplifier (1V/Pa), then it is converted to
"lvm" file and processed in LabView - using FFT. The FFT'd signal is
displayed and the impeller rotating frequence and its harmonics can be seen.
More, because I'm using a voice recorder, the frequency range is very low
(0-500 Hz).
Many thanks in advance!
Kind Regards.