Edison may not have been the first to record the human voice

On December 7, 1877, Thomas Edison walked into the offices of Scientific American and placed a metal device on a desk. With a turn of a crank, Edison astonished the dozen or so staffers who had gathered around the contraption.The machine spoke. “Good morning,” it said in Edison’s voice. “How do you do?” SciAm’s editors described the demonstration … Continue reading "Edison may not have been the first to record the human voice"