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ChristianBergler / ANIMAL-SPOT

An Animal Independent Deep Learning Framework for Bioacoustic Signal Segmentation and Classification Including a Detailed User-Guide
GNU General Public License v3.0
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reference dB from 20 to 0 #7

Closed canihaveabravo closed 1 month ago

canihaveabravo commented 8 months ago

Hi Christian,

How do we change the reference dB from 20 to 0?

Thanks, Lorenzo

ChristianBergler commented 7 months ago

Hi Lorenzo,

Line 46 in audiodataset.py - ref db level

Hope that helps!

Best, Christian

canihaveabravo commented 7 months ago

Thank you. What criteria is used to set the ref-dB level? I found that by changing to 0dB this improved the amplitude 'contrast' in my input image.

ChristianBergler commented 7 months ago

There is no „official criterion“. This is a data-specific parameter, dependent on the average power in your signals. In case your recording-specific spectral amplitudes are less intense, a dB normalisation with a high reference level is not optimal (and vice versa). If you look into the animal spot paper - appendix - you will find a table with all the hyperparameters. There you can see that we also changed the reference level for certain recordings. This has to be properly specified via looking at the signals. Or, as another solution: min-max normalisation. Which is also part of the new animal sport version. Available as a command line option, and does not require a pre-check of intensity levels.

canihaveabravo commented 7 months ago

thanks for the info