Hearing Aid

Hearing Aid

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Usage conditions apply
Sonotone hearing aid, model 451, serial #162964, with air and bone conduction receivers. Inscriptions read "SONOTONE / REG.U.S.P.O. / U.S. PAT. No 1811638 / 162964 / OTHER PATS. PEND. / MADE IN U.S.A./ NEW YORK This dates from 1937 and was given to the Smithsonian in 1945.
Ref: Hugo Lieber, “Earphone Transmitter,” U.S. Patent 1,811,638 (June 23, 1931), assigned to Sonotone Corporation.
Currently not on view
Object Name
Hearing Aid
hearing aid
Other Terms
Hearing Aid; Prostheses
Physical Description
plastic (overall material)
metal (overall material)
fabric (overall material)
burgundy (overall color)
brown (overall color)
black (overall color)
overall: 2.5 cm x 7.8 cm; in x 3 1/16 in
overall: 1 3/4 in x 11 in x 3 7/8 in; 4.445 cm x 27.94 cm x 9.8425 cm
ID Number
accession number
catalog number
serial number
accession number
Credit Line
Sonotone Corporation
See more items in
Medicine and Science: Medicine
Data Source
National Museum of American History
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