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1 ene 1903 año - De Forest invents Audion

Descripción:

He envents the audion in an effort to amplify sound waves after thinking the solution for amplification is found in gas and electricity

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Sound Timeline

ByKaroline Herkamp

23 abr 2021

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251

fecha:

1 ene 1903 año

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~ 122 years ago

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