Small ear trumpet, 19th century
Small ear trumpet, 19th century
Hal-Hen Aid-Klip, 1940
Medresco Model Mark I, 1948
Akustik Silver Type CX, ca. 1931
Alt's Micro-telephone, ca. 1906
Paravox Model YM Veri-Small, 1948
Zenith A2A Radionic, ca. 1942
Telex Model 1550, ca. 1940
Aurex Model CA, ca. 1944
Electro-Ear, ca. 1936
Acousticon A-130, ca. 1948
Toshiba Model THA-1001, 1961
Western Electric 1A, ca. 1938
Western Electric Model 134, ca. 1945
Cochlear Nucleus 22, 1996
Dahlberg Model Magic Ear, 1956
Maico model F (Quiet Ear), 1949
Politzer's Acoumeter
Beltone Monopac Model S, ca. 1948