## Automatic Bird Song Recognition |

### From inside the book

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Page 23

linguistic decoder (LD). 7.3.1. Acoustic Processor The acoustic processor (AP) is

used both in the training and recognition

**phase**. The recognition**phase**involves an acoustic preprocessor (AP) and alinguistic decoder (LD). 7.3.1. Acoustic Processor The acoustic processor (AP) is

used both in the training and recognition

**phases**. The AP converts the input ...Page 30

4) ) of X(m) represents the strength of the corresponding complex wave, and X(m)

's

rather than complex numbers (as is the case with waveforms), then for m ...

4) ) of X(m) represents the strength of the corresponding complex wave, and X(m)

's

**phase**(IPL), p.4) represents its offset in time. Assuming that the x(n) are realrather than complex numbers (as is the case with waveforms), then for m ...

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Taking the magnitude of the Fourier transformed signal removes the

information in the signal; taking the logarithm of this result then de-emphasizes

the relative contribution of the larger peaks of the spectrum. The inverse Fourier ...

Taking the magnitude of the Fourier transformed signal removes the

**phase**information in the signal; taking the logarithm of this result then de-emphasizes

the relative contribution of the larger peaks of the spectrum. The inverse Fourier ...

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60 Figure acoustic algorithm analysis average amplitude avian bird song bird species California Quail calls CDFE cepstral cepstral peak Cepstrum chirp feature vectors chirp list Clark's Nutcracker comparison Computer congruent corresponding described in Section detected difference dynamic time warping entire song excursion cycle Figure 11b formula Frequency Frequency Duration glottal Greenewalt harmonics Hence High Low High House Finch human speech recognition I I I individual inter-note distances internal tympaniform membranes Itakura distance length Linear Prediction Low High Low magnitude Markov models noise Olive-sided Flycatcher phase phonemes present point range recognition system recordings represented ripples sample points sampling rate Scrub Jay segment of speech sequence of labels signal similar sine wave sonagrams song feature Song Sparrow sound spectrum squawk Steller's Jay subsource Swainson's Thrush syntactic Theorem thesis trachea Typical upward zero crossing vibration vocal tract Warbling Vireo waveform Western Meadowlark whistled White-crowned Sparrow