Ultra Leap a British and California firm uses ultrasound waves to create the sensation of touch mid-air.

英国和加州的一家名为Ultra Leap的公司利用超声波创造出在半空中触摸的感觉。

That sent ultrasound waves through the water.

那通过水发送超声波。

Transducers are made from arrays of tiny piezoelectric structures that convert electrical signals into ultrasound waves by vibrating at an appropriate frequency.

压电式换能器是由具有‘压电'效应的一系列敏感元件机构组成。敏感元件机构通过‘定频'震荡将电信号转换成超声波。

And by using the interactions between ultrasound waves the display can even produce audible sound.

通过利用超声波之间的相互作用，显示器甚至可以产生可听见的声音。

Well, ultrasound waves are just another type of sound wave.

好吧，超声波只是另一种声波。

And these high-frequency, short-wavelength ultrasound waves are especially good at reflecting without spreading out too much.

而这些高频、短波长的超声波特别擅长反射，而不会扩散太多。

When it's too dark to see, he emits an ultrasound wave with tall peaks.

当天黑得看不见时，他会发出波峰很高的超声波。

At very high levels, the heat caused by ultrasound waves can damage sensitive tissues, but technicians typically use the lowest levels possible.

在非常高的水平下，超声波引起的热量会损害敏感组织，但技术人员通常使用尽可能低的水平。

A-scan: a small ultrasound probe that throws ultrasound waves in the eye ball and then detects their reflections or echo timings, calculating the eye ball length.

A 超：一种小型超声波探头，它将超声波投射到眼球中，然后检测其反射或回声时间，计算出眼球的长度。

Doctors can use an ultrasound transducer to make ultrasound waves that travel through your body, and reflect off different squishy bits, like organs, or a fetus.

医生可以使用超声波换能器产生穿过您身体的超声波，并反射不同的软质部分， 如器官或胎儿。

Since sound waves lose speed and clarity when traveling through air, this gooey substance ensures an airtight seal between the body and the wand emitting ultrasound waves.

由于声波在空气中传播时会失去速度和清晰度，这种粘性物质可确保身体和发射超声波的魔杖之间的气密密封。