Roll Over Image to Zoom ‹ Back to Collection

Zenith Royal Hearing Aid

  • Zenith
  • 3.125 in. H x 2.25 in. W x .75 in. D
    Plastic, steel, aluminum, metal
  • 2007.098

Description

The miniaturized vacuum tubes used in this hearing aid made it portable—but the vacuum tubes sucked energy, requiring large batteries. Users of hearing aids like this one could wear the battery pack in custom-designed leg holsters or, if a woman, tucked into a specially designed brassiere. 

Search Our Online Collections

Distillations

Listen to the latest episodes of CHF’s award-winning science podcast.

 

Historically Grounded Perspectives

The Center for Contemporary History and Policy explores issues ranging from energy to medicine on CHF's blog, Periodic Tabloid.

 

Support CHF

Help us preserve and share the history of chemistry and related sciences. Make a tax-deductible donation online.