What features to extract from wavelet transform for acoustic scene classification.
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Hi all,
I am working on classifying different tasks happening in a construction site from the ambient sounds. I have extracted some time-domain, frequency-domain, and cepstral-domain (e.g., MFCC, PLPCC) features from the audio. MFCC, and PLPCC are working great till now. Now I would like to try out some features from wavelet transform. I have never used wavelets before, and finding it a little hard to decide on which wavelet family and deconstruction level to use. Another thing is, how the final feature space is designed based on wavelet transforms. I mean, what type of time varying features are important for details and approximations? Any expert opinion will be highly appriciated.
I am attaching a sample 20 second audio waveform and spectrogram for reference if it helps.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/237188/image.jpeg)
Thanks!!
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jibrahim
2019년 9월 6일
Hi Khandakar,
This example in Audio Toolbox might be of interst to you:
In addition to mel spectrograms, it also showcases wavelet scattering.
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