Editing Bell Labs (section)

===1930s===
[[File:Green Banks - Jansky Antena.jpg|thumb|Reconstruction of the directional antenna used in the discovery of radio emission of extraterrestrial origin by [[Karl Guthe Jansky]] at [[Bell Telephone Laboratories]] in 1932]]
In 1931, a foundation for [[radio astronomy]] was laid by [[Karl Jansky]] during his work investigating the origins of static on long-distance [[Shortwave bands|shortwave communications]]. He discovered that radio waves were being emitted from the center of the [[galaxy]].

In 1931 and 1932, the labs made experimental high fidelity, long playing, and even stereophonic recordings of the [[Philadelphia Orchestra]], conducted by [[Leopold Stokowski]].<ref>[https://www.stokowski.org/Harvey_Fletcher_and_Bell_Labs_Stereo.htm Leopold Stokowski, Harvey Fletcher, and the Bell Laboratories Experimental Recordings] {{Webarchive|url=https://web.archive.org/web/20191227150259/https://www.stokowski.org/Harvey_Fletcher_and_Bell_Labs_Stereo.htm |date=December 27, 2019 }}, Stokowski.org. Retrieved March 3, 2020.</ref>

In 1933, [[Stereophonic sound|stereo signals]] were transmitted live from [[Philadelphia]] to Washington, D.C.

In 1937, the [[vocoder]], an electronic speech compression device, or codec, and the [[Voder]], the first electronic [[Speech synthesis|speech synthesizer]], were developed and demonstrated by [[Homer Dudley]], the Voder being demonstrated at the 1939 New York World's Fair. Bell researcher [[Clinton Davisson]] shared the Nobel Prize in Physics with [[George Paget Thomson]] for the discovery of [[electron diffraction]], which helped lay the foundation for [[solid-state electronics]].