I recommend that you read some books on sound meter.
我推荐你读一些介绍诗歌声韵知识的书。
In the middle is a sound level meter.
在中东是一个声级计。
If you have a sound pressure meter, you can take the two readings.
如果你有一个音压的测量器，你可以读到两个数据。
If you have a sound pressure meter, you can take the two readings.
如果你有一个音压的测量器，你可以读到两个数据。
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