inaudibility

例句：

1. 1. The sound of the waterfallwas so loud that it was impossible tohear anything else.
   瀑布的声音太响了，以至于什么都听不到。
2. 2. The speaker'svoice was so soft that only a fewpeople could hear him clearly.
   演讲者的声音太轻了，只有少数人能清楚地听到他。
3. 3. The new technology has made itpossible for us to achieve inaudibilityin our communication.
   新技术使我们能够实现通信中的完全听不见。