Horns are the earliest form of amplification. Horns do not use electricity. Thomas Edison, Magnavox, and Victrola all developed advanced and well-performing horns from 1880 to the 1920's. The problem with horns is that they could not amplify the sound very much. With the use of electrical amplification in the future loud sound could be generated to fill large public spaces. Horns remain a novelty for collectors today.
Horn uses: Audio recording for entertainment and record keeping, later on for voice radio
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