This folder contains correspondence relating to Edison's deafness and to devices for the hearing impaired. Included are requests for Edison's opinion of existing hearing aids, as well as inquiries concerning his plans to invent such a device. Most of the letters received no answer or a standard reply stating that Edison had discontinued his hearing aid experiments and that he expected to return to them in the future.
A sample of less than 5 percent of the documents has been selected. All of the selected documents contain marginalia by Edison. Courtesy of Thomas Edison National Historical Park.