Gondran C, Siebert E, Yacoub S, Novakov E
Laboratoire d'lonique et d'Electrochimie du Solide de Grenoble, ENSEEG, BP 75, Saint Martin d'Hères, France.
Med Biol Eng Comput. 1996 Nov;34(6):460-6. doi: 10.1007/BF02523851.
The electrochemical noise from dry NASICON-based surface electrodes and pregelled Ag-AgCl electrodes is evaluated in saline solutions and on the skin. The electrochemical noise from the electrode/electrolyte interface is found to be negligible (less than 1 microV peak to peak). On the skin, the noise level is highly dependent on the patient. At high frequencies, the skin/electrode interface noise is equal to 'thermal noise' and can be related to the real part of the skin/electrode impedance. At low frequencies (F < 100 Hz), excess noise is observed that varies as f-2. It is tentatively ascribed to a non-stationary process or noise of electrochemical origin due to the ionic nature of the skin. The contribution of residual EMG signal of low amplitude (5 microV peak to peak) is suggested for electrodes with large surface area.
对基于NASICON的干式表面电极和预凝胶化Ag-AgCl电极在盐溶液和皮肤上的电化学噪声进行了评估。发现电极/电解质界面的电化学噪声可忽略不计（峰峰值小于1微伏）。在皮肤上，噪声水平高度依赖于患者。在高频时，皮肤/电极界面噪声等于“热噪声”，并且可能与皮肤/电极阻抗的实部有关。在低频（F < 100 Hz）时，观察到过量噪声，其随f -2变化。初步将其归因于由于皮肤的离子性质导致的非平稳过程或电化学起源的噪声。对于大表面积电极，建议考虑低幅度（峰峰值5微伏）的残余肌电信号的贡献。
