![](http://www.alamy.com/thumbs/6/F881D64D-FD64-4D1D-89BF-92605DCEBF64/2AD042N.jpg)
Field sparrow (Spizella pusilla) song, wavelet graph. This image was produced by converting the frequencies of sounds made by a Field sparrow, a bird
Field sparrow (Spizella pusilla) song, wavelet graph. This image was produced by converting the frequencies of sounds made by a Field 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: 5197px × 4060px
Photo credit: © AGUASONIC ACOUSTICS/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No
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