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]
- Books
- Online
On the construction of hearing and speaking instruments / by John Bishop.
Bishop, John, 1797-1873.Date: [1856]
- Books
- Online
The dentaphone : a new scientific invention, which enables the deaf to hear by the sound-vibrations conveyed through the medium of the teeth, and the deaf and dumb to hear and learn to speak.
American dentaphone co., Cincinnati.Date: [1879], [©1879]