Radioear B-5A Carbon Hearing Aid
The Radioear B-5A carbon hearing aid was manufactured by E. A. Myers
& Sons Ltd. of Pittsburg, PA in 1932.
The Model B-5A consisted of a carbon
transmitter (microphone) 2˝” in diameter that plugged onto the top a metal battery
case. The battery case held two “C” size batteries giving an operating
voltage of 3 volts.
This hearing aid used a small black miniature receiver onto
which an ear mold was clipped.