acoustic material

例句：

1. 1. Thesound of the piano is a perfect example of how acoustical materials can be used to create beautiful music.
   钢琴的声音是声学材料如何被用来创造美妙音乐的完美例子。
2. 2. In acoustical engineering, it's important to understand how different materials interact with each other and their surroundings.
   在声学工程中，了解不同材料相互之间及其周围环境的作用是很重要的。
3. 3. Acoustic engineers use specialized equipment to test the acoustical properties of materials for various applications.
   声学工程师使用专门的设备来测试各种应用中的材料的声学特性。