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automated peak frequencies

 
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Bob



Joined: 01 Dec 2003
Posts: 4
Location: Amsterdam

PostPosted: Mon Nov 15, 2004 3:57 pm    Post subject: automated peak frequencies Reply with quote

Hi all,

I would like to do the following for my research on bird sounds: select a fragment of a sonagram (preferably a box, but a time slice will suffice for now), subdivide that selection in, say, 10 equally spaced parts (subdivision in time only), and determine the peak frequency in each segment.

Is there a way to do this from the console?

Is it at all possible to make selections in time as well as in frequency domain? I will have to be able to isolate the bird call from the ambient noise, so selecting the right frequency band is important.

Thanks a lot for your support!

Bob
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kare



Joined: 16 Aug 2002
Posts: 371
Location: KTH, Centre for Speech Technology

PostPosted: Mon Nov 15, 2004 10:41 pm    Post subject: Reply with quote

You probably want to create your own tool. Check out Snack http://www.speech.kth.se/snack/ and the wsurf demos that come with the WaveSurfer source distribution. They show how to have a WaveSurfer component for display and input in specialised tools. Snack is the basic toolkit used in WaveSurfer and gives much more detailed access. When necessary you can easily integrate your own C-code with Snack.
The selection in WaveSurfer consists of start and end points in time.

Kåre
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Bob



Joined: 01 Dec 2003
Posts: 4
Location: Amsterdam

PostPosted: Tue Nov 16, 2004 8:23 am    Post subject: very well Reply with quote

Thanks, Kare, for your response. I think I'll stick to a tool I programmed in Matlab (for different purposes).

Cheers,
Bob
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