Before the 19th century, trying to conceal a hearing device was virtually impossible. Most of the hearing instruments of the day consisted of large and unwieldy devices that were awkward to use and were definitely not easily portable. In the years following this era, though, inventors tried to create a smaller and more efficient hearing device that was easier to conceal. The models invented during this period were the beginnings of the popular hearing instruments that we know today.
The Acoustic Headband