The Invention of Hearing Aids
Ch1.Sound and Silence Before Technology
Ch2.The Ear Trumpet Era
Ch3.Carbon and Current: The First Electric Hearing Aids
Ch4.Vacuum Tubes and the Amplification Revolution
Ch5.The Transistor Breakthrough
Ch6.Going Digital: Microprocessors Enter the Ear Canal
Ch7.Cochlear Implants and the Redefinition of Hearing
Ch8.The Future Inside the Ear