acoustic stiffness

例句：

1. 1. The new car has a high acoustic stiffness, making it quieter in the city.
   这款新车的声学刚度高，使得它在城市里更安静。
2. 2.The sound of the piano is very loud, but its acoustic stiffness makes it playable even at low volumes.
   钢琴的声音很大，但其声学刚度使得即使在低音量下也能演奏。
3. 3.The material used for building houses has to be strong enough to withstand the acoustic stiffness of the building structure.
   用于建造房屋的材料必须足够坚固，以承受建筑结构的声学刚度。