| Only the Dyson, which relies on centrifugal force to spin the dust out of the airstream, maintains constant suction. |
| We examine how movement patterns are modified when speakers change from an egressive to ingressive airstream. |
| The fingerhole on each pipe does not affect pitch, but when it is closed the airstream forces the respective reed to vibrate. |
| Orographic assent is where an airstream hits a mountain and rises because of the topography. |
| The unvoiced fricative phonemes stem from the hissing of a steady airstream through the mouth. |
| The third type, clicks, use the velaric ingressive airstream mechanism, produced by rarefying a small volume of air enclosed in the mouth. |
