1. Vibration.
Mgbe ihe nkedo ahụ tara nchara, a naghị ekwe ka ejiri mgbanaka wepụ ya n'ike. Kpatụ ihe nkedo ahụ na mgbanaka, gbajie sundries na ọnọdụ nchara, tụgharịa aka ekpe na aka nri na mgbanaka ahụ, mgbe ahụ ị nwere ike wepụ ihe nkedo ahụ. E chụpụrụ.
2. Ọkụ.
Ọ bụrụ na ịghasa ahụ dị ezigbo nchara, ị nwere ike iji ịgbado ọkụ eletrik oxidize ihe nkedo ahụ, gbaa ọkụ na-acha uhie uhie, wee tinye mmanụ mmanụ n'ime oghere nke ịghasa, chere obere oge, wee wepụ ihe nkedo ahụ na mgbanaka.