Source: techon.nikkeibp.co.jp
Source: techon.nikkeibp.co.jp
Fabric manufacturer, Shibata Technotex, developed a cloth with copper wire woven around a polyester core. Other conductive metals could be use instead of copper. The thread highly flexible and it can be woven into material use to make cloth or clothing. The material is washable and the thread can be soldered.
They have used this material to make a speaker. They placed a sheet of conductive film between two pieces of conductive fabric. The sound signal is connect to the two conductive fabric. When the current flows through the fabric, it creates a magnetic field which makes the conductive film vibrate and sound is created by the film.
