- Joined
- Jun 8, 2004
- Messages
- 54,903
- Reaction score
- 1,518
Have you seen this?
Deafness in Disguise: Concealed Hearing Devices of the 19th and 20th Centuries
The "Timeline" showing various devices is interesting. Here's one example:
1819 ~ F. C. Rein makes an acoustic throne for King Goa (John) of Portugal. The throne consists of hollowed armrests, carved into lion’s heads at the front. The armrest cavities lead to a resonant box located in the seat of the throne, and the sound is then heard via a hearing tube connected to the resonator.
http://beckerexhibits.wustl.edu/did/images1/kinggoachair_large.jpg
Deafness in Disguise: Concealed Hearing Devices of the 19th and 20th Centuries
The "Timeline" showing various devices is interesting. Here's one example:
1819 ~ F. C. Rein makes an acoustic throne for King Goa (John) of Portugal. The throne consists of hollowed armrests, carved into lion’s heads at the front. The armrest cavities lead to a resonant box located in the seat of the throne, and the sound is then heard via a hearing tube connected to the resonator.
http://beckerexhibits.wustl.edu/did/images1/kinggoachair_large.jpg