The seat rows only backscatter frequencies above a certain threshold, though, so they act, in effect, as a sound filter.
每排座椅只反射高于一定频率的声音，因此实际上它们充当的是声音过滤器。
The seat rows only backscatter frequencies above a certain threshold, though, so they act, in effect, as a sound filter.
每排座椅只反射高于一定频率的声音，因此实际上它们充当的是声音过滤器。
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