Alexander Graham Bell ließ den ersten von ihm erfundenen Fernsprechapparat patentieren. Das einfache Telefon übertrug Schwingungen der Stimme elektromagnetisch über Draht - zunächst über zwei Häuser.
Jun 2023
Who Invented The Telephone?
Alexander Graham Bell and Thomas Watson made an important discovery, by accident, on June 2, 1875. While working on their ‘harmonic telegraph’. Watson inadvertently plucked a reed that had been tightly wound around the pole of its electromagnet, producing a twang that Bell heard ... Show More
12m 7s
Mar 2023
Call Me — Maybe? 50 Years Since the First Cell Phone Call
On April 3, 1973, an engineer named Martin Cooper stood nervously along a busy midtown Manhattan street, about to make a phone call. It was a call that would change life as we know it: The first cell phone call ever. The phone Cooper used that day — a prototype — was a bulky, 2-p ... Show More
49m 25s
Oct 2021
La formidable invention du phonographe par Thomas Edison
En 1877, Thomas Edison a mis au point le tout premier appareil capable d'enregistrer et de reproduire des sons ! Cette invention lui a aussi donné l'idée d'une machine pour communiquer avec les défunts... Du phonographe au gramophone, en passant par le nécrophone, le paléophone e ... Show More
8m 35s