Medresco Portable Hearing Aid
1953
Hearing aid, type BE14
1978-1980
Hearing aid
1900-1940
Alta2 Invisible In the Canal hearing aid
2018
Gutta-percha ear trumpet hearing aid, 1840-1910
1840-1910
Ear trumpet hearing aid
1869-1900
Conversation tube hearing aid
1870-1920
Conversation tube hearing aid
1860-1900
Intra aural hearing aid
1978-1981
Alta2 Invisible In the Canal hearing aid
2018
Mechanical hearing aid
1935-1936
Mechanical hearing aid
1935-1936
The Ardente Hearing aid, London, England, 1920-1930
1920-1930
Hearing aid model BE11
1975-1990
Ear trumpet made from shell
1850-1900
Bakelite Ear Trumpet
1901-1940
Twin ear trumpets on adjustable head-band
1900-1920
Acousticon transistor hearing aid and chassis
Bakelite ear trumpet
1901-1940
Telescopic ear trumpet hearing aid
1900-1950
Telescopic ear trumpet hearing aid
1900-1950
Hearing aid, Sonotone 1000
1960-1970
Medresco hearing aid
Pioneer bone-conduction hearing aid
Radio-Aid hearing aid disguised as a camera
Medresco hearing aid
Medresco hearing aid
Hearing aid with phenolic brown battery box and earpiece
1929
Eerade Device
1947
Silver-plated telescoping ear trumpet
1830-1880
Hearing aid
Chassis of Bonochord transistor hearing aid
Shell Ear Trumpet
1801-1900
Two Alta2 Invisible In the Canal Hearing Aids
2018
Carved ivory earpiece for a conversation tube hearing aid
1880-1915
Funnel shaped silver bell, part of a conversation tube hearing aid
1880-1915
Part of a conversation tube hearing aid
1880-1915
Hearing aid, model R3
1960-1970
Medresco Portable Hearing Aid
1953
Acousticon transistor hearing aid
The Ardente Hearing aid, London, England, 1920-1930
1920-1930
Body-worn hearing aid
1960-1980
Body-worn hearing aid
1955-1957
Body-worn hearing aid
1970-1985
Body-worn hearing aid
1950-1960
Body-worn hearing aid
1960-1980
Body-worn hearing aid
1975-1985
Body-worn hearing aid
1955-1965
Body-worn hearing aid
1975-1985
Body-worn hearing aid
1960-1975