Concept
Hearing Aids
Images
Catalogue
- Books
- Online
Specification of Eduardo Giampietror : articial tympanum.
Giampietro, Eduardo.Date: 1874- Audio
Hearing and balance.
Date: 2005- Books
Telecom catalogue / Sound Advantage.
Date: [1992]- Archives and manuscripts
M0013745: Ear trumpet, 19th century
Date: October 1954
- Books
- Online
On the construction of hearing and speaking instruments / by John Bishop.
Bishop, John, 1797-1873.Date: [1856]