overall: 3 1/4 in x 5 in x 3/4 in; 8.255 cm x 12.7 cm x 1.905 cm
Object Name:
hearing aids
Other Terms:
Medicine
Place made:
United States: New York, New York
Date made:
1923
Description:
The Acousticon SRB is a carbon microphone hearing aid introduced in 1910 by the General Acoustic Company. New, it cost $40.00. This example from 1923 was donated to the Smithsonian in 1939. It has a bone conduction head piece with band attached, and amplifier. The inscriptions read “DICTOGRAPH PRODUCTS CORPORATION / NEW YORK” and “MADE IN U.S.A.” and “TYPE S.R.B.” and “148454” with patent dates of Oct. 26, 1902; Feb. 12, 1907; and Feb. 19, 1907.
Ref: Howell W. Haff, “Telephone-Transmitter, U.S. Patent 874,004 (Oct. 28, 1902), assigned to General Acoustic Company.
Kelley M. Turner and Norton W. Johnston, “Carbon-Ball Transmitter,” U.S. Patent 844,635 (Feb. 19, 1907), assigned to General Acoustic Co.
