HI-dop is the Doppler for not only Ob/Gyn but also Physicians, Surgeons, and other clinical specialist.
HI-dop let doctors hear and check the sound of blood flowing change made by extraction Doppler frequncy of singals reflected from blood vessel after applying ultrasound at the region of blood vessel.
HI-bebe Sound makes you hear what fetus is saying.
HI-bebe Sound makes FHR sound 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.