Cabling and a test resistor for the first attempt...

First attempt. It needs some slight cosmetic improvements, I think. Works quite well though!

Second attempt. I wasn't sure if a thin coil would work as well, so I tried a paperclip. Works well, and... slightly better co

Final attempt. Bent paperclips into J shapes, wound magnet wire around each.

An in-progress earhook. This one has the resistor attached, coil wound, and initial heatshrink on to insulate the resistor sold

Almost-completed earhook. This one has the resistor soldered in, cable attached, strain-relief ziptie attached, and is ready to

Completed set! Covered each in heat-shrink, then added a different colour of heat-shrink at the top of each to identify which i