Inspired by Marcelo Coehlo’s paper speaker and Vincent Leclerc’s Accouphene textile speaker, these paper and fabric speakers are made by running 5-9V sound amplified signal through a very conductive coil in close proximity to a magnet. Unlike most speakers that have the wire coil wrapped cylindrically and placed around the magnet, here the coil is in the plane and directly adhered to the membrane that moves the air creating sound.
The coils can be made from a variety of conductive materials. Copper tape,tape, conductive fabric and stainless steel thread work really well. Gold leaf does not work as well (yet!) in comparison. The coil can be one sided or two sided. A continuous spiral gives better results than one that backs up on itself.
The coils can be fused to a variety of membrane materials such as paper, vellum, veneer, fabric, transparency, tissue paper…
I’ve posted more about the construction process here:
Thick metal embroidery thread embroidered and strong magnet
In the video you will see: the cube magnet has one strong side and two weaker sides that cause the speaker to be quieter, the audio signal is coming from an mp3 player and is being amplified by a disassembled off-the-shelf speaker unit with a 3.7V LiPo battery.
Conductive fabric lasercut and fused to canvas.
Conductive fabric lasercut and fused to paper.
Stainless steel thread sandwiched between masking tape.
Steel thread sewn into canvas.
References and Links
Some experiments made with the couching embroidery technique and a coil basket weaving technique: