Harp Glissando - Ah Jet Cabin. Meditation and Relaxation Sounds. The magical tones of a harp being strummed, ascending and descending. Ten variations of glissandos spaced 15 seconds apart. The sweep of air over the wings is a constant sound, a type of white noise that has a definite calming effect. A great sleep aid, the masking of ringing in the ears is very good, A warm, comforting ambience. The steady white noise also gives a sense of rushing water as from a waterfall.