👉 The periodogram is a statistical test used in signal processing to analyze the frequency content of a time series. It quantifies the "period" or the number of cycles a signal repeats over its duration. This is often used in audio and speech processing, but can also be applied to other types of signals including video streams and music. The periodogram provides information about the distribution of the signal's frequency content within its range of values. It measures how much each frequency component contributes to the overall signal,
