A spectrum analyzer is a type of audio analysis tool that is used to visualize the frequency content of audio signals. It allows the user to see the distribution of different frequency components within a sound, and can be used to identify the different frequency ranges that make up a sound, such as bass, mids, and treble.
A spectrum analyzer typically displays the frequency content of an audio signal in the form of a graph, with frequency on the x-axis and amplitude (or level) on the y-axis. The graph will show the relative level of different frequencies present in the audio signal, with the height of each frequency band indicating the level of that frequency.
Some spectrum analyzers also include additional features such as the ability to measure and display the level of individual frequency bands, or to display the phase of the audio signal.
In summary, a spectrum analyzer is a tool that allows the user to visualize the frequency content of audio signals, by displaying the distribution of different frequency components within a sound, it helps to identify the different frequency ranges that make up a sound and can be used to identify unwanted sounds and troubleshoot issues.