the increase in aerodynamic drag as an airplane approaches the speed of sound
sound barrier的用法和样例:
例句
用作名词 (n.)
Only this military aircraft is able to break the sound barrier. 只有这架军用飞机能够突破声障。
An added voltage is necessary to overcome the barrier thus created. 必须增加一个附加电压去克服这样引起的位垒。
She raised between them a barrier impenetrable as a wall. 她就在他们之间垒起一道不能越过的界线,象一堵墙一般。
Another flight of jets exploded through sound. 又一队喷气机雷鸣般地突破了音障。
If one feels those around him have become too noisy, a sound block device can be activated and soundproofing will immediately go into effect. 如今只要是公共场所,都设有声音调控器,如果嫌别人太吵,开启音障设备即可隔音。