柯林斯詞典sonic boom 1. N a loud explosive sound caused by the shock wave of an aircraft, etc, travelling at supersonic speed (超音速飛行器的)音爆 返回 sonic boom劍橋詞典an explosive sound made by an aircraft , bullet , etc. travelling faster than the speed at which sound travels （飛機、子彈等突破音障時產(chǎn)生的）音爆，聲震 返回 sonic boom