**Author details**

Neng Nenden Mulyaningsih1 \* and Rum Sapundani2

1 Department of Physics Education, Universitas Indraprasta PGRI, Jakarta, Indonesia

2 Department of Electromedical Engineering, Universitas Muhammadiyah Purwokerto, Indonesia

\*Address all correspondence to: nengnendenmulyaningsih@gmail.com

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