The ae sensor calibration system based on pulsed surface wave sound field was built several commercial and self-made ae sensors had been calibrated on it.

建立了基于脉冲表面波声场的声发射传感器标定系统，对商用和自制的几种声发射传感器进行了标定。

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The AE sensor calibration system based on pulsed surface wave sound field was built, several commercial and self-made AE sensors had been calibrated on it.

建立了基于脉冲表面波声场的声发射传感器标定系统，对商用和自制的几种声发射传感器进行了标定。

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You've got a sound wave traveling merrily along through one medium, when suddenly it hits a different medium, what does gonna happen then?

声波在一种介质中顺畅地传播，突然触及了不同的介质，这时会发生什么？

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Eight heads rose in a line on the track as a wave of sound and flash photography exploded around the stadium before crashing on to the most scrutinized piece of land on the planet like a tsunami.

CNN: Olympic Bolt: Witness report of historic 100m

No-one who heard it will ever forget the tidal wave of sound welling from the depths of the crowd that greeted the news that Mr Obama had won - it rippled back through the crowd that stretched far into the darkness of the night and seemed to hang and echo between the downtown skyscrapers.

BBC: Obama campaign blazes to victory

The design of the regenerator causes the helium to expand and contract in a way that produces a powerful sound wave.

ECONOMIST: A more efficient way to make electricity in spacecraft