Spectrum analysis is a method used in signal processing and telecommunications to analyze the frequency content of a signal. It involves breaking down a signal into its individual frequency components, which can be represented in a graphical form known as a frequency spectrum. Spectrum analysis is used in various fields such as audio processing, telecommunications, and radio frequency analysis to extract useful information about a signal's bandwidth, frequency distribution, and other characteristics. This allows researchers to gain insights into the underlying patterns and structure of signals, as well as to identify and isolate specific frequencies of interest.