TY - DATA T1 - The FFT spectrograms and CGD spectrograms. PY - 2015/04/29 AU - J. Vandermeulen AU - C. Bahr AU - E. Tullo AU - I. Fontana AU - S. Ott AU - M. Kashiha AU - M. Guarino AU - C. P. H. Moons AU - F. A. M. Tuyttens AU - T. A. Niewold AU - D. Berckmans UR - https://plos.figshare.com/articles/figure/_The_FFT_spectrograms_and_CGD_spectrograms_/1398722 DO - 10.1371/journal.pone.0123111.g003 L4 - https://ndownloader.figshare.com/files/2045372 KW - Discerning Pig Screams KW - information KW - monitoring KW - sound features KW - Production Environments Pig vocalisations KW - detection method KW - scream N2 - The upper two figures show the same screams, the lower figures show the same sneeze. The left figures depict the spectrogram made from FFT while the figures on the right side depict the spectrogram made from CGD. The formant structure of a scream is visible (B). These formants are the whiter values in the CGD spectrogram. It is not straightforward to find the same structure in the FFT spectrogram. Because the difference between the formant value and the surrounding values is much bigger relative to the maximum and minimum values of the CGD compared to the FFT ER -