Eurasian skylark song, wavelet graph
Eurasian skylark (Alauda arvensis) song, wavelet graph. This image was produced by converting the frequencies of sounds made by a Eurasian skylark into a graph using a mathematical process known as wavelets. Wavelets reveal structure and detail that are not always visible in standard graphs of frequency over time (known as a spectrogram)., Photo by AGUASONIC ACOUSTICS/SCIENCE PHOTO LIBRARY
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