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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...
Sensing biopotentials without contacting the subject's body could obviate skin preparation and allow the recording of the ECG without needing to remove clothing. However, body surface charges unrelated to bioelectric signals can interfere the record by contributing a signal that results from the distance variation between the body surface and the electrode used to detect electric potential. This paper...
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