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1933 Ad Western Electric Hearing Aid Bell Telephone ...
https://www.pinterest.com/pin/463167142918820766/
Oct 25, 2017 - 1933 Ad Western Electric Hearing Aid Bell Telephone Graybar Audiophone Deafness
Western Hearing Aid Center | Hear What You've Been Missing!
https://westernhearingaidcenter.com/
Western Hearing Aid Center H3@r1ng-W3st3rnD0ug 2020-10-12T22:50:42+00:00. 1912 North Division Suite #102 Spokane, WA 99207. Local: (509) 328-6731 | …
Hearing Aids - Eric Wrobbel
https://ericwrobbel.com/collections/hearing-aids.htm
Amplification was greatly improved with the introduction of vacuum tubes to hearing aids in the 1920s and 1930s. We now think of this as the transition from ‘electrical’ to ‘electronic.’ The black Western Electric 125 “Ortho-Tronic” (1940, USA) shown top center could fit in a pocket but still required a separate battery pack.
Hearing Device Timeline - Becker Medical Library
http://beckerexhibits.wustl.edu/did/timeline/
Other manufacturers of carbon hearing aids, such as Acousticon, Aurophone, Gem, Maico, Radioear, Sonotone, and Western Electric, switch to the production of vacuum tube hearing aids. 1938 Maico produces the first audiometer to incorporate circuitry based on the threshold of the normal human ear.
Deafness as a Public Health Issue in the 1920s & 1930s ...
https://nyamcenterforhistory.org/2016/06/29/deafness-as-a-public-health-issue-in-the-1920s-1930s-part-1-of-2/
Advertisement for Western Electric Hearing Aid, the “Audiophone.” These before-and-after shots were powerful for demonstrating the effects of “normal” hearing, sending the message that outward signs of deafness, such as the “confused face,” could easily disappear once being fitted properly with a hearing aid. ( Hearing News, December 1936)
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