The frequency spectrum is a representation of different frequencies of sound or electromagnetic waves, showing how much energy is present at each frequency. It helps us understand the characteristics of signals, such as music or radio waves, by breaking them down into their individual frequency components. In audio, the frequency spectrum ranges from low bass sounds to high treble sounds, typically measured in hertz (Hz). In the context of electromagnetic radiation, the spectrum includes various types of waves, such as radio waves, microwaves, and visible light, each with distinct properties and applications.