System and a method for sound recognition

A method for automatic for sound recognition, comprising a) raw spectrogram generation from a sound signal spectrum;

• b) wide-band spectrum determination;
• c) wide-band continuous spectrum determination;
• d) tonal and time-transient spectrum determination;
• e) wide-band continuous spectrogram and tonal and time-transient spectrogram determination;
• and f) spectrogram image generation;
• wherein step a) comprises using a fractional octave filter bank using a frequency-adapted band filter time response, yielding a filtered time-signal per frequency band;
• step b) comprises using a wide-band spectral envelope;
• step c) comprises applying an exponential percentile estimator on the wide-band spectrum;
• step d) comprises subtracting the wide-band continuous spectrum from the raw sound signal spectrum;
• step e) comprises accumulating the wide-band continuous spectrum into the wide-band continuous spectrogram and accumulating the tonal and time-transient spectrum into the tonal and time-transient spectrogram;
• and step f) comprises combining the wide-band continuous spectrogram and the tonal and time-transient spectrogram into spectrogram image frames.