tag:blogger.com,1999:blog-3604753446193593441.post3427134614445203949..comments2024-03-27T06:21:40.221-07:00Comments on Robin Delany: WIP Wednesday - Ear Trumpets The hearing aid of the 18th centuryAnonymoushttp://www.blogger.com/profile/11213730757533825727noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-3604753446193593441.post-1823153247073509202013-06-06T16:59:10.297-07:002013-06-06T16:59:10.297-07:00They used the theory of funneling the sound waves ...They used the theory of funneling the sound waves directly to the ear drum. They must have been very funny to use. Thanks for tweeting. Anonymoushttps://www.blogger.com/profile/11213730757533825727noreply@blogger.comtag:blogger.com,1999:blog-3604753446193593441.post-53617676949461337482013-03-29T08:46:34.532-07:002013-03-29T08:46:34.532-07:00Very interesting. I wonder how well they actually ...Very interesting. I wonder how well they actually worked. I tweeted.Anonymousnoreply@blogger.com