supersoni ( synonym found)
Definition of supersoni:

°(of a sound) ultrasonic, having a frequency too high to be audible.
°(of a speed) greater than the speed of sound (in the same medium, and at the same temperature and pressure).
Definition of supersoni:

°(of a sound) ultrasonic, having a frequency too high to be audible.
°(of a speed) greater than the speed of sound (in the same medium, and at the same temperature and pressure).
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