Title :
Noise analysis of NASICON ceramic dry electrodes
Author :
Yacoub, Slim ; Novakov, Ed ; Guméry, Pierre-Yves ; Gondran, Chad ; Siebert, Elisabeth
Author_Institution :
Lab. d´´Instrum. Micro-Inf. et Electron., Univ. Joseph Fourier, Grenoble, France
Abstract :
The noise and the impedance between two non-polarizable dry NASICON ceramic electrodes were investigated. The electrodes were placed on the ventral side of the forearm over inactive muscle area without contact paste. Significant noise was found in the bandwidth 1 Hz-100 Hz. This noise was more intense than the thermal noise of the resistive part of the electrode impedance, the amplifier voltage and current noise together. The power spectral density (PSD) of the observed noise follows an 1/fα law with α=1,6 to 2. This excess noise probably has an electrochemical origin and can be related to the skin-electrode interface
Keywords :
bioelectric potentials; biomedical equipment; biomedical measurement; ceramics; electrodes; noise; 1 to 100 Hz; NASICON ceramic dry electrodes; bioelectric signals recording; contact paste; electrochemical origin; electrode noise analysis; forearm ventral side; inactive muscle area; nonpolarizable electrodes; power spectral density; thermal noise; Bandwidth; Ceramics; Electrodes; Electromyography; Impedance measurement; Low-noise amplifiers; Noise measurement; Polarization; Skin; Voltage;
Conference_Titel :
Engineering in Medicine and Biology Society, 1995., IEEE 17th Annual Conference
Conference_Location :
Montreal, Que.
Print_ISBN :
0-7803-2475-7
DOI :
10.1109/IEMBS.1995.579823
