Supersonic Speed
noun
A super sound that's fast is supersonic speed.
ちょうおんそく
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
僕のパンダロボットは、超音速で空を飛べるんだぜ。
My panda robot can fly at supersonic speeds.