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]

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Description

Spectrum analysis of the uncompressed source for 10 seconds of pink noise.
Analysis done using Audacity, plotting with GnuPlot

English: Pink noise spectrum
Русский: Спектр розового шума
Date 01:45, 14 March 2006
Source en:Image:Pink noise spectrum.png
Author en:User:Ktims
Permission
(Reusing this file)
PD-icon.svg This work has been released into the public domain by its author, Ktims at the Wikipedia project. This applies worldwide.

In case this is not legally possible:
Ktims grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.


Converted to SVG.svg 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:

Lissajous small.svg
 This graphic was created with gnuplot:

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/TimeThumbnailDimensionsUserComment
current19:40, 9 July 2006Thumbnail for version as of 19:40, 9 July 2006800 × 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}}
  • You cannot overwrite this file.

File usage on other wikis

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Metadata

This file contains additional information, such as Exif metadata, probably added from the digital camera or scanner used to create or digitize it. If the file has been modified from its original state, some details may not fully reflect the modified file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Horizontal resolution 28.35 dpc
Vertical resolution 28.35 dpc
File change date and time 01:45, 14 March 2006
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