Results 241 to 250 of about 347,752 (281)

Middle Ear Impedance Measurements

Journal of Speech and Hearing Research, 1970
The middle ear impedance of a group of 25 subjects with normal middle ears was studied with the Zwislocki acoustic bridge. The basis for selection of test ears was carefully documented. Average and range of impedance measures were compared to recent data. The effects on impedance readings of operator error in the preliminary measurement of canal volume
K S, Burke, T C, Nilges, G B, Henry
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Differential impedance plethysmography for measuring thoracic impedances

Medical & Biological Engineering & Computing, 1982
A critical evaluation of the measurement of the transthoracic basic impedance Zo according to Kubicek's method revealed inhomogeneous electrical field-distributions in the region of the neck and the shoulders and in the region of the mammae in female subjects. These inhornogeneties were found to introduce uncontrollable errors, like position dependency
J H, Meijer, J P, Reulen, P L, Oe, W, Allon, L G, Thijs, H, Schneider   +5 more
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Analysis of intraluminal impedance measurements

Physiological Measurement, 2003
Intraluminal impedance is an emerging technique to monitor the esophagus so that the occurrence of gastroesophageal reflux episodes can be observed. The impedance traces of the esophagus have wide variations which correspond to the occurrence of activities such as swallow or reflux that cause the impedance to change.
Awad, Al-Zaben, V, Chandrasekar
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Acoustical impedance measurement.

The Journal of the Acoustical Society of America, 2008
Many components of specialty transducers have extremely tight acoustic impedance tolerances and become difficult to measure in a production environment. Comparing the device to the acoustical impedance of a cavity is one method of determining its acoustical impedance. A precise method of determining the acoustical impedance is described.
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Clinical Importance of Impedance Measurements

Journal of Clinical Gastroenterology, 2008
Because impedance changes have been shown to be a sensitive and reliable means to detect fluid or gas movement within the esophagus, numerous studies worldwide have addressed the potential for impedance determinations to provide a sensitive measure of either esophageal transit function or the presence and extent of gastroesophageal reflux.
Amit, Agrawal, Donald O, Castell
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Body impedance measurements during dialysis.

European journal of clinical nutrition, 1991
Changes in body weight in relation to changes in body impedance were studied in six male and four female patients before and during dialysis. Before dialysis, fat-free mass from skinfolds was 46.5 +/- 6.8 kg, and total body water calculated from bio-electrical impedance was 36.9 +/- 5.2 kg.
DE LORENZO, ANTONINO, BARRA, PAOLO, Sasso, GF, Battistini, NC, Deurenberg, P.   +4 more
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Transcephalic Impedance Measurement During Infancy

Developmental Medicine & Child Neurology, 1977
SUMMARYTranscephalic impedance is the measurement of resistance of the head to the flow of alternating current. Impedance determinations have been made in 35 normal infants from birth to one year of age. These infants, when serially studied, display a typical linear increase of impedance in the first year of life.
D H, Reigel, D E, Dallman, T B, Scarff, J, Woodford   +3 more
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Impedance Measurements at NRC

2024 Conference on Precision Electromagnetic Measurements (CPEM)
2024 Conference on Precision Electromagnetic Measurements (CPEM), July 8-12, 2024, Denver, Colorado, United ...
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