Power spectrum
From Wikipedia, the free encyclopedia
 |
The English used in this article may not be easy for everybody to understand. (November 2011) |
The power spectrum of a signal is the power of that signal at each frequency that it contains. For example, white noise, which contains all frequencies at the same power, has a flat power spectrum. The power spectrum of the sound of the bottom key on a piano would have a high value at the frequency corresponding to its note, and low values elsewhere.
