A spectrum analysis of Mains hum , generated from an uncompressed file thanks to User:Omegatron , using Audacity. Important to note if comparing this to the other spectrum analyses on Colors of noise is that due to the signal having only a single major frequency component (so nearly all of the energy is concentrated in a small frequency band), the intensity scale range was increased by about 50% to show the full peak. Also, the frequency scale was adjusted to include 60Hz and its surrounding frequencies.

This plot was created with Gnuplot .

This work has been released into the public domain by its author, Ktims at English Wikipedia . This applies worldwide. In some countries this may not be legally possible; if so: Ktims grants anyone the right to use this work for any purpose , without any conditions, unless such conditions are required by law. Public domain Public domain false false