研究者们利用一块镀铝的氮化铝微小跳板代替了光束，跳板上的铝层通过变薄和变厚来进行振动。
Instead of a beam, they fashioned a tiny diving board of aluminum nitride plated with aluminum that vibrated by getting thinner and thicker.
一些研究者已经开始制造依靠周围光、热、振动或电视发射机提供能源的设备。
Some researchers are already building devices that run on "ambient" energy harvested from light, heat, vibration or TV transmitters.
研究人员分析了所有来访者振动的频率、持续时间以及幅度。
Then the researchers analyzed the frequency, duration and amplitude of each visitor's vibrations.
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