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When we talk about the audio frequency spectrum, it is known as the range of sound frequencies audible to humans.

The loudness of sound, power of the pressure in technical terms is measured in decibel. What is the Audio SpectrumĪ sound is a form of energy, and the sound frequency is measured in hertz, known as the number of vibrations per second. Graphical or visual representation of these frequency ranges is known as a sound or audio spectrum. Just like the other sounds constitute different frequencies, different frequencies are audible differently. Some sounds have no clear pitch however, some mixtures of sounds have low or high notes. You will note that probably there are different types of sounds around you, for example, the sound of:Īll these types of sounds are composed of different frequencies. Open your eyes and listen for a little while.