Conversation tube hearing aid, also known as a speaking tube, by F. C. Rein & Son, London, c. 1900
Details
- Category:
- Audiology
- Collection:
- Sir Henry Wellcome's Museum Collection
- Object Number:
- A8878
- Materials:
- trumpet & earpiece, vulcanite, tube, cotton and tube, felt
- Measurements:
-
unfurted: length 850 mm
tube: diameter 15 mm
trumpet aperture: diameter 47 mm
- type:
- hearing aids
