+**Fourier Analysis** explores how any complex [Signal](/wiki/signal) can be expressed as a sum of simple [Wave](/wiki/wave)s. This mathematical tool reveals the underlying frequencies within data, transforming time-domain information into a frequency-domain perspective.
+## See also
+- [Frequency](/wiki/frequency)
+- [Signal Processing](/wiki/signal_processing)
+- [Harmonic Analysis](/wiki/harmonic_analysis)
... 1 more lines