Computational and Mathematical Methods in Medicine

Research Article

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

Table 3

Sensitivity (%) of estimators for = 4096 ms. and are the two autocorrelation estimators, respectively. , are the envelopes of directional signals, and is the envelope of the nondirectional signal. indicates the combined estimator.
Sensitivity ( ) Estimators
   88.50% ( ) 88.43% ( )
   86.63% ( ) 84.79% ( )
   81.79% ( ) 75.05% ( )
( ) 95.48% ( ) 94.93% ( )