Title:
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Microphonics in biopotential measurements with capacitive electrodes
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Author:
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Luna Lozano, P. S.; Pallàs Areny, Ramon
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Other authors:
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Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica; Universitat Politècnica de Catalunya. GRUP ISI - Grup d'Instrumentació, Sensors i Interfícies |
Abstract:
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Biopotential measurements with capacitive
electrodes do not need any direct contact between electrode and skin, which saves the time devoted to expose and prepare
the contact area when measuring with conductive electrodes. However, mechanical vibrations resulting from physiological
functions such as respiration and cardiac contraction can change the capacitance of the electrode and affect the
recordings. This transformation of mechanical vibrations into undesired electric signals is termed microphonics. We have evaluated microphonics in capacitive ECG recordings obtained
from a dressed subject seated on a common chair with electrodes placed on the front side of the backrest of the chair.
Depending on the softness of the backrest, the recordings may be clearly affected by the displacement of the thorax back wall
due to the respiration and to the heart’s mechanical activity. |
Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria electrònica -Electrodes -Elèctrodes |
Rights:
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Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
Document type:
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Article - Published version Conference Object |
Published by:
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IEEE Press. Institute of Electrical and Electronics Engineers
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