Under high temperature effect resistivity reduce and be electric, but them beside computer, micro-wave oven, speaker, air condition can shield they release electromagnetic wave, degrade damage for human.

• 且竹炭在高温烧制下因电阻系数降低而具有导电性，所以在家电制品如电脑、微波炉、音响、冷气机等旁边放置竹炭可以遮蔽其产生之电磁波，降低对人体造成的伤害。