低噪音级别设计，可在公共场合使用，不影响周边环境和人员正常活动。
Low noise level design, can be used in public places, do not affect the surrounding environment and normal activities.
噪音的级别是多少？
GEO600探测到的信号并不是来自什么被忽视的噪音源，Hogan认为GEO600探测到了时空本身发生的量子级别的波动。
The signal being detected by GEO600 isn't a noise source that's been overlooked, Hogan believes GEO600 is seeing quantum fluctuations in the fabric of space-time itself.
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