New Estimators and Guidelines for Better Use of Fetal Heart Rate Estimators with Doppler Ultrasound Devices
Figure 7
False negative rates for and with dB, . Accuracy of 25 bpm was obtained only for whatever the frequency, whereas for accuracy was obtained for only 100, 150, 200, 220, and 240 bpm. (a) False negative rate for . (b) False negative rate for .
