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• Phonograph
  ...es which were coupled to the open air through a flaring [[Horn loudspeaker|horn]], or directly to the listener's ears through [[stethoscope]]-type earphone ...ively simple matter. I had to keep my mouth about six inches away from the horn and remember not to make my voice too loud if I wanted anything approximati
  115 KB (17,286 words) - 16:32, 16 December 2018