Receiving circuits detect the wave reflected by human tissue and output electric signal that has been demodulated.

回波处理电路用于检测由人体组织反射的超声信息，对转换成的电信号进行解调输出。

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Owing to the presence of interface of dielectric and air, it is required to impose three waves, including incident plane wave, reflected and transmitted waves at the total-scattered field boundary.

考虑入射波在两种介质界面上会产生反射和透射，故在总场边界上引入入射波、反射波和透射波。

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But a variant of the technique, which involves measuring changes in the speed of the reflected wave, can reveal information about moisture.

ECONOMIST: Winemaking and radar

As its name suggests, it works by broadcasting a radar wave into the ground and interpreting (as any radar does) what is reflected back.

ECONOMIST: Winemaking and radar