Uncertainty quantification in the assessment of human exposure to pulsed or multi-frequency fields

Abstract

Overview

This paper examines the exigent task of precisely assessing human exposure to pulsed or multi-frequency electromagnetic fields.

Approach

• A focus on the weighted peak method, commonly utilized in standards and guidelines, assessing its implementation in both time and frequency domains.
• Application of polynomial chaos expansion theory for uncertainty quantification.
• Employment of sensitivity analysis to pinpoint influential parameters on the exposure index and quantify their effects.

Main Findings

The study demonstrates that the time domain application of the weighted peak method aligns well with established principles of electromagnetic induction and electrostimulation, providing accurate and precise results.

However, issues are identified with the frequency domain approach, particularly its sensitivity to inconsequential parameters due to phase variations in its weight function. A novel phase definition is proposed to resolve these issues.

Conclusion

The revised phase definition in the frequency domain method is recommended to enhance accuracy and precision in exposure assessments. The study also makes all related codes publicly available on GitHub for further research and verification.