The minimum information required by ultra-sound examination devices is frequency and speed of sound wave.
An ultrasound scan also known as sonography is a medical test that uses high-frequency sound waves to capture live images from the inside of your body.
The high frequency sound wave enables the motion of the motion of the fetus to be detected through Doppler effect.
Thus, the minimum information required by ultra-sound examination devices is frequency and speed of sound wave.
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