Madhyama
A sound, which has fewer vibrations than Para and Pashyanti, but which is finer than Vaikhari, is called Madhyama.

Madhyama is a sound that can hardly be heard. Ordinarily, when two objects hit each other they produce a coarse sound; like when we clap. But in the case of Madhyama no two things physically hit each other to produce an audible sound. Madhyana produces vibrations such as when one whispers. It is an intermediate sound. The word Madhyama means "in between" or "in the middle". So this middle sound can be called whispering or is like the sound of whispering.