A research team from Cornell’s Creative Machines Lab has managed to 3D print the cone, coil and magnet of a loudspeaker, and then use it to throw out sounds from a digital audio player.
A 3D printer was used first to print off the plastic shell, flexible membrane and base. Then a silver ink conductive coil was printed inside the housing. And, finally, a strontium ferrite magnet was printed into the base. The whole unit was then heated to harden the metal components, before being connected to a digital audio recorder and power amp for a demo test.
Read more from gizmag, December 18, 2013.