Nathaniel Baldwin

Last updated: Monday, May 30 2011 10:28 a.m. MDT

The headphone effect

In the first years of the 20th century Nathaniel Baldwin, tired of not being able to hear general conference, invented a sound amplification system in the form of a headset. The Radio Division of the federal Bureau of Steam Engineering was made aware via colorful correspondence.

Published: May 30, 2011

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