Keywords: Sine1000 spectrum.png en wikipedia 2009 November 28 Spectrum analysis of the uncompressed source for Sine_wave_1000 ogg 5 seconds of sine wave at 1000 Hz Note the logarithmic frequency scale The y-range of this graph may not be appropriate for comparison of similar waveforms; it is designed to match the frequency spectrum graphs for audio noises on en Colors of noise The analysis was done using en Audacity and plotting with en gnuplot Transparency was touched up in en GIMP to make the graph background pure white Instructions 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 n set terminal png transparent font /usr/share/fonts/truetype/ttf-bitstream-vera/Vera ttf size 800 600 enhancedset output sine1000_spectrum png this seems to fix the trailers on the TTF font for the x-label set bmargin 4 enable grid set gridset grid mxtics set up x-axis set logscale x 10set xrange 100 22000set xlabel Frequency Hz set xtics border nomirror set up y-axis set yrange -40 0set 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 sine1000 txt title 1KHz Sine Wave with filledcurves x1 3 original upload log page en wikipedia Sine1000+spectrum png '1' Upload date User Bytes Dimensions Comment - nowrap 2006-03-14 01 48 43 nowrap Ktims nowrap 4361 nowrap 800×600 <small><nowiki>Spectrum analysis of Sine_wave_1000 ogg 5 seconds of sine wave at 1000 Hz Note the logarithmic frequency scale The analysis was done using Audacity and plotting with gnuplot Transparency was touched up in GIMP to make the graph </nowiki></small> Audio spectrums |