HI-dop is the Doppler for not only Ob/Gyn but also Physicians, Surgeons,
and other clinical specialists.
Hl-dop let doctors hear and check the sound of blood flowing
HI-bebe indicates FHR as numeral by
irradiating ultrasound at the abdomen,
abstracting doppler frequency of heart beat cycle from the
signals reflected from fetal heart, outputting FHR change as a
sound, and analyzing these signals.