New Estimators and Guidelines for Better Use of Fetal Heart Rate Estimators with Doppler Ultrasound Devices

Table 2

FHR error of estimation (bpm) obtained by all estimators tested for different configurations of SNR, false negative rate (FNR), and 𝑊 = 4096 ms.

Estimators	FHR error of estimation (bpm)
	𝐸1, 𝐸2, 𝐸4, 𝐸7	𝐸3, 𝐸5, 𝐸6	𝐸8
FNR = 0%, 6 dB > SNR > 2 dB	0.8	4	6
FNR = 1.5%, SNR > 6 dB	0.25	—	—