circa 1880: One of Thomas Edison's inventions which failed to outlive him, the Aerophone, which consisted of a speaking trumpet controlled by the outflow of compressed air which amplified the human voice. It could be heard clearly through receiving hearing trumpets as far as six miles. (Photo by Three Lions/Getty Images) Bizarre Innovation Binoculars Aerophone
Musical instruments graphic template. Trumpet. Vector illustration Aerophone No People Bass Musical instruments graphic template. Trumpet
Musical instruments graphic template. Trumpet. Vector illustration Aerophone No People Bass Musical instruments graphic template. Trumpet