Title :
Wide Bandwidlt Fetal Phonography Using a Sensor Matched to the Compliance of the Mother´s Abdominal Wall
Author :
Talbert, D.G. ; Davies, W.Lyn ; Johnson, Frank ; Abraham, Nicholas ; Colley, Nigel ; Southall, David P.
Author_Institution :
Departments of Biomedical Engineering and Perinatal Medicine, Institute of Obstetrics, Queen Charlotte´´s Hospital
Abstract :
A transducer has been developed which, by improving the sound coupling efficiency between the surface of the maternal abdomen and the sensor, allows a major part of the acoustic output of the fetus to be examined. This has been achieved by a system of compliance matching using a ceramic cantilever beam transducer. The principle is equally applicable to the use of a simple ceramic beam or other active elements.
Keywords :
Abdomen; Acoustic sensors; Acoustic transducers; Ceramics; Energy exchange; Fetal heart; Fetal heart rate; Fetus; Frequency; Heart rate; Abdominal Muscles; Female; Fetal Heart; Fetal Monitoring; Humans; Phonocardiography; Pregnancy; Transducers;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
DOI :
10.1109/TBME.1986.325850
