In trying to record the brain's electrical activity off the scalp, he adds, "people assumed that the signal-to-noise ratio and the information content of these signals were limited."

在尝试记录头皮以下的大脑电活动时，他补充说，“人们想当然的认为信号的信噪比和这些信号的信息内容是有限的。”

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The infrared gas sensor contains an open-path gas chamber, a high SNR (signal to noise ratio) infrared detector, and an electrical modulated MEMS infrared emitter.

红外气体传感器采用开放式气室，选用高信噪比的探测器和电调制的MEMS红外光源。

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