Hi!
I would try to measure signal autocorrelation first. Just record the splashes
for some time period (so you have 10-20 splashes), and calculate the
autocorrelation values of this signal for different offsets.
Look at the autocorrelation function to see if that gives you a sensible
information (peak at the delta T between splashes?). If yes, you can try further
to extract dT automatically.
Cheers!
Catun
Hi,
>
>I am new to DSP and such, and I was wondering if you guys/gals can
>give me any suggestions on hardware and software tools which can allow
>me to plot the frequency of splashes made by paddling of the limbs.
>
>Say we have a swimmer in a small pool. I want to know if I can find
>out the frequency of the 'splashes' (I was thinking of using the
sound
>of the limbs moving and splashing in water as a count trigger) he/she
>makes during a swim, using DSP and microphones. This experiment is to
>see how fast he/she becomes tired.
>
>I am thinking of doing this in small scale with bathtub toys which do
>swimming animations first.
>
>Has anyone got to do something like this? I was hoping for suggestions
>in both hardware and software, as I am not familiar with DSPs.
>Anything for doing the experiment for small tub toys.
>
>Labview and NI compatible products would be good, but anything you are
>familiar with is good for me too.
>
>Thank you for any help.
>
>