acoustical Doppler effect

例句：

1. 1. The acoustics of the room are perfect for a lecture.
   这个房间的声学非常适合做讲座。
2. 2. She is an expert in acoustics and has published many papers on the subject.
   她是一位声学专家，并且已经发表了许多关于这个主题的论文。
3. 3. Acoustics is a field that studies how sound travels through different media.
   声学是一门研究声音在不同介质中传播方式的学科。