文中分析了高空气象条件与声传播的关系，并通过能听度评估气象条件。

This paper analyses the connection between high altitude weather information and sound propagation in the atmosphere, and evaluates the weather information by audibility.

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这种声波如此巨大(大约2万光年长)又如此低沉(大约低于听力范围50个八度)，所以天文学家对它进行必要的调整后，人才能听到。

The sound waves were so huge (about 20,000 light years in length) and so low (about 50 octaves below hearing range) that the astronomer had to adjust them to the range of human hearing.

youdao

这种声波如此巨大(大约2万光年长)又如此低沉(大约低于听力范围50个八度)，所以天文学家对它进行必要的调整后，人才能听到。

The sound waves were so huge (about 20, 000 light years in length) and so low (about 50 octaves below hearing range) that the astronomer had to adjust them to the range of human hearing.

youdao