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Listening to Music
What Is Sound?
Early Recording Devices
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amplifier amplitude band binaural bursts of electricity called his recordings cartridge sends changes concert hall Edison called elec electrical current electrical signals electromagnet Emile Berliner erase gramophone graph graphophone grooves hear sounds high fidelity stereophonic High notes high or low human voice instrument invented John Philip Sousa Krishef listening loudspeaker Low notes machine magnetic tape magnetophone master record Minneapolis minstrel monaural recording motor mouthpiece musicians needle to vibrate needle was fastened old recording horn ords original sound wave phono phonograph industry pickup arm PICKUP CARTRIDGE pitch notes playback played back record player record sounds recording devices Replaces the Recording reverse record RPM records Semper Fidelis sound recording sound we hear spaced microphones speaker special wax splicing Stereo Stereophonic recording stereophonic sound STORY OF RECORDING stylus symphony orchestra tape recorder tape was introduced Thomas Edison tin foil tions Today tweeter two-ear vibrating needle Victrola waffle iron wire woofer zinc disc