Source: wikibot/goertzel-algorithm
= Goertzel algorithm
{wiki=Goertzel_algorithm}
The Goertzel algorithm is an efficient digital signal processing algorithm used to detect the presence of specific frequencies within a signal. It is particularly useful when analyzing signals in applications like tone detection, DTMF (Dual-Tone Multi-Frequency) decoding, and other frequency-domain processes where only a few specific frequencies are of interest, rather than performing a full Fourier transform.