Title :
An all-transistor hearing aid
Author_Institution :
Electronics and Acoustic Consultant, Elmhurst, Illinois
Keywords :
Auditory system; Batteries; Circuits; Electron tubes; Germanium; Microphones; P-n junctions; Temperature control; Temperature distribution; Voltage;
Journal_Title :
Audio, Transactions of the IRE Professional Group on
DOI :
10.1109/T-SP.1954.28227
