sound barrier

例句：

1. 1. The soundbarrier is a significant obstacle that prevents aircraft from flying over the ocean.
   声波屏障是一个重大障碍，阻止飞机飞越海洋。
2. 2. The sound barrier has been reduced by 40% since the introduction of new technology.
   自从引入新技术以来，声波屏障减少了40%。
3. 3.The sound barrier was designed to protect marine mammals from noise pollution.
   声波屏障的设计是为了保护海洋哺乳动物免受噪音污染。