Inspirational sound
An inspiratory sound ( Latin : īnspīrāre "to breathe in") arises when the phonation current does not come from the lungs through the vocal tract (neck tube) to the outside of the body, but is formed by inhaling with negative pressure in the chest.
Inspirational sounds do not appear in any phonetic inventory of a known language. However, they are used in a secondary language, for example in German with an inspiratory yes as a short answer to a question, as an interjection or delay sound .