File:Pink noise spectrum.png
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Pink_noise_spectrum.png (800 × 600 pixels, file size: 5 KB, MIME type: image/png)
Summary[edit]
File:Pink noise spectrum.svg is a vector version of this file. It should be used in place of this raster image when not inferior.
File:Pink noise spectrum.png File:Pink noise spectrum.svg
For more information, see Help:SVG.
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Description |
Spectrum analysis of the uncompressed source for 10 seconds of pink noise. English: Pink noise spectrum
Русский: Спектр розового шума
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Date | 01:45, 14 March 2006 | ||
Source | en:Image:Pink noise spectrum.png | ||
Author | en:User:Ktims | ||
Permission (Reusing this file) |
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This graph image could be recreated using vector graphics as an SVG file. This has several advantages; see Commons:Media for cleanup for more information. If an SVG form of this image is available, please upload it and afterwards replace this template with {{vector version available|new image name}}. |
Instructions[edit]
Obtain the frequency analysis from Audacity, set the maximum number of windows, and use a Hamming window. The following script was used to generate the image:
Gnuplot code
set terminal png transparent font "/usr/share/fonts/truetype/ttf-bitstream-vera/Vera.ttf" size 800,600 enhanced
set output "pink_noise_spectrum.png"
# this seems to fix the trailers on the TTF font for the x-label
set bmargin 4
# enable grid
set grid
set grid mxtics
# set up x-axis
set logscale x 10
set xrange [100:22000]
set xlabel "Frequency (Hz)"
set xtics border nomirror
# set up y-axis
set yrange [-40:0]
set ylabel "Intensity (dB)"
set ytics border nomirror
# again to deal with bad bboxes on the TTF...
set key height 1 box
# plot the output from Audacity
plot "pink_noise.txt" title "Pink Noise" with filledcurves x1 3
File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 19:40, 9 July 2006 | 800 × 600 (5 KB) | Wdwd (talk | contribs) | {{Information |Description=Pink noise spectrum |Source=en wikipedia |Date=01:45, 14 March 2006 |Author=en:Ktims }} {{PD-self}} |
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