Ear trumpet
1850-1900
Hearing aid
1900-1940
Conversation tube hearing aid
1801-1900
Medresco Portable Hearing Aid
1953
Ear trumpet made from an animal horn
1701-1900
Alta2 Invisible In the Canal hearing aid
2018
The Ardente Hearing aid, London, England, 1920-1930
1920-1930
Silver ear trumpet hearing aid, London, England, 1814
1814
Brass ear trumpet
1801-1900
Conversation tube hearing aid
1860-1900
Ear trumpet and walking stick combined
1875-1885
Conversation tube hearing aid
1870-1920
Hearing aid, type BE14
1978-1980
Intra aural hearing aid
1978-1981
Ear trumpet hearing aid
1869-1900
Alta2 Invisible In the Canal hearing aid
2018
Gutta-percha ear trumpet hearing aid, 1840-1910
1840-1910
Swan shaped ear trumpet
1850-1900
Miniature ear trumpets
1805-1900
Acoustic headband with pair of auricle hearing aids
1900-1930
Ear trumpet made from shell
1850-1900
Miniature ear trumpet hearing aid
1801-1900
Two OL65 hearing aids with one earphone and two earmolds
1969
Anatomical model of the larynx.
1960-1968
Anatomical model of the ear
1960-1968
Swan-shaped ear trumpet
1801-1900
Conversation tube hearing aid
1880-1935
Silver ear trumpet hearing aid
1829
Gardiner Brown's tuning fork (C3)
1880-1895
Silver-plated telescoping ear trumpet
1830-1880
Telescope ear trumpet
1850-1900
Acoustic impedance meter type ZA20
1970-1980
Ear trumpet, possibly used during a period of mourning, Europe, 1850-1910
1850-1910
Telescopic ear trumpet
1840-1900
Portable speech training aid
1965-1975
Double ear trumpet with headband
1850-1928
Ear trumpet
1850-1900
Telescoping ear trumpet
1870-1900
Infant audiometer, Denmark, 1970-1980
1970-1980
Struycken monochord (cased) made by H. Pfau of Berlin circa 1930
1930
Portable microscope requiring a fibreoptic light source
1960-1975
Soft toy, with cochlear implant, China, 1999
1999
Set of eight tuning forks, Unknown maker, 1935-1950
1935-1950
Phonic Ear and F.M. charger used in speech training
1960-1970
Small crescent-shaped metal ear trumpet
1850-1930
Hearing aid
1850-1910
Aluminium ear trumpet
1870-1917
Conversation tube hearing aid
1801-1900
Bakelite Ear Trumpet
1901-1940
Tin plate ear trumpet
1850-1900