a phonograph, later called a gramophone and since the 1940s a record player

1940s acoustic air called coupled cylinder deviations diaphragm disc drawing drawings early earphones ears engraved etched faintly flaring gramophone groove helical horn impressed incised later listener39aph39s music musics needle open phonograph phonographs physical playback player produced record recorded recreate reproducing rotated rotating sound spiral stylus surface traces vibrated vibration vibrations waveforms waves wood wooden