遷せん音おん速そく

noun

transonic speed

Technical term in aerodynamics referring to speeds near the speed of sound, typically Mach 0.8–1.2.

• 遷せん音おん速そく領りょう域いきでは衝しょう撃げき波はが発はっ生せいしやすい。

  Shock waves tend to form in the transonic speed range.