这就引出了另一个我们需要考虑的变量——建筑材料、墙壁及地板覆盖物的声学性质。
That brings me to another variable we need to consider—the acoustic characteristics of the building materials as well as the wall and floor coverings.
其实是一位材料学家发现了一种处理木材的方法，使其处理后的声学性质与克雷莫纳木材非常相似。
What happened was a material scientist figured out a way to process wood to make it acoustically similar to the Cremonese wood.
气泡改变了管道的声学性质，这是由于能量的耗散和增加了顺从性的缘故。
The gas bubbles affect the acoustic properties of the line by energy dissipation as well as by added compliance.
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