助听器

例句：

1. 1. He can't hear the car approaching because of the heavy fog.
   由于浓雾，他听不见汽车接近的声音。
2. 2. She needs to improve her hearing so she can better understand what is being said around her.
   她需要提高听力，以便更好地理解周围人说话的内容。
3. 3.The hearing aids helped her to communicate more effectively with people who were deaf.
   助听器帮助她与聋人更有效地交流。