And 108 to 114 decibels is the average noise produced at a rock concert.

而108到114分贝则是摇滚音乐会产生的平均噪音。

We're still in pretty quiet territory, so moving higher up to 44 decibels is the average ambient noise that's present in a library.

我们仍然处在相当安静的环境中，所以把声音调高到44分贝，就是图书馆里的平均环境噪音。