supersonic

adjective

having frequencies above those of audible sound
可聴音を超える周波数を持つさま
(of speed) greater than the speed of sound in a given medium (especially air)
（速度について）与えられた媒体（特に空気）において音速よりも速く
- a supersonic bomber flies so fast that it must release its bombs while the target is still over the horizon
  超音速爆撃機は、目標がまだ地平線の上にある間にその爆弾を放出するほど速く飛ぶ

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