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Effects of Temperature and Humidity on Skin Resistance, Capacitance, and Threshold Current in Electrotactile Stimulation

Year: 2025
Type: article
Abstract: Background: Transcutaneous electrical stimulation has been extensively studied and applied due to its numerous advantages. However, individuals exhibit varying skin impedance and threshold current under different ambient temperature and humidity conditions, which prevents the stable operation of electric tactile devices in all environments. Therefore, investigating the variations in threshold current among individuals under different temperature and humidity conditions holds significant value.Methods: Based on a skin-electrode impedance model, the measurement and calculation of subjects' skin moisture, resistance-capacitance parameters, and threshold current under different ambient temperature and humidity conditions were performed. Subsequently, subjects were classified and corresponding relationships were obtained.Results: Results indicate that increases in both localized ambient temperatures and relative humidities can cause an increase in the threshold current, with the magnitude of the increase significantly influenced by gender and BMI. A similar trend was observed for changes in skin surface moisture with temperature and humidity. Our results suggest a strong correlation between changes in skin surface moisture and variations in threshold current, skin resistance, and capacitance under the same conditions.Conclusions: Ambient temperature and humidity will affect the degree of skin hydration, thus change the skin resistance and capacitance, and then affect the threshold current. These findings offer critical quantitative data for the precise operation control of electrical stimulation devices.
DOI: 10.1142/s0219519425500253
Authors: DINGKANG GAO, KAI YUE, ZICHENG WANG, TINGTING HUANG
Language: English
Open Access status: green
Award: G174834940
OpenAlex ID: W4413859323
FWCI: 2.192
Cites: 38
Cited by: 4
Related to: 10