![](http://www.alamy.com/thumbs/6/8BB12AFA-39F4-407A-BB67-CD87AACF9258/2AD043C.jpg)
Black throated sparrow (Amphispiza bilineata) song, wavelet graph. This image was produced by converting the frequencies of sounds made by a black thr
Black throated sparrow (Amphispiza bilineata) song, wavelet graph. This image was produced by converting the frequencies of sounds made by a black throated sparrow, a bird native to North America, 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). This image has been plotted as a polar coordinate (circular) graph but wavelet graphs can also be in rectangular form. Image created by Mark Fischer from Aguasonic Acoustics, USA.
Size: 5301px × 3976px
Photo credit: © AGUASONIC ACOUSTICS/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No
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