They work by sending out pulses of high-frequency sound and then interpreting the reflections as images.To do all this, though, you need a device called a transducer.
它们的工作原理是通过发出高频声波脉冲并将反馈的信息转变成图像，为了实现这一过程，你还需要一个叫做变频器的设备。
They work by sending out pulses of high-frequency sound and then interpreting the reflections as images. To do all this, though, you need a device called a transducer.
它们的工作原理是通过发出高频声波脉冲并将反馈的信息转变成图像，为了实现这一过程，你还需要一个叫做变频器的设备。
In the real world, as sound waves travel through the air, they bounce off of every surface in our environment, resulting in a complex mix of reflections.
在现实世界中，当声波穿过空气，每一个在我们的环境中表面被弹开，导致一个复杂的混合反射。
In the real world, as sound waves travel through the air, they bounce off of every surface in our environment, resulting in a complex mix of reflections.
在现实世界中，当声波穿过空气，每一个在我们的环境中表面被弹开，导致一个复杂的混合反射。
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