The photo-acoustic effect results from the absorption of modulated light energy.

粉煤灰光声效应的产生源于粉煤灰材料对入射调制光能量的吸收。

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A new method measuring speed of sound in a weak scattering fluid is proposed by using the ultrasound - modulated light.

本文介绍一种利用超声调制光波现象测量超声波在弱散射液中传输速度的方法。

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This detector has adopted modulated light and 4 pulse synchronous demodulating technique. So the detecting reliability and sensitivity are improved greatly.

这种光电检测器采用了调制光和4脉冲同步解调技术，提高了光电检测的可靠性和灵敏度。

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The effect is preternatural--bringing an immediacy to the past that is paradoxically fresher than the present--and is accomplished with careful attention to the texture of materials and the play of light on surfaces, modulated with projected shadow.

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