overall: 2 3/4 in x 4 in x 1 in; 6.985 cm x 10.16 cm x 2.54 cm
Object Name:
hearing aids
Other Terms:
Medicine
Description:
Acousticon carbon microphone hearing aid made by Dictograph Products Company, Inc., in New York City, in 1937. This a Model C-4, Serial No. 001871, with air conduction earpiece, amplifier, and battery connection, was donated to the Smithsonian in 1939.
