1 jan 1898 ano - 1898 – Magnetic recording demonstrated

Descrição:

Valdemar Poulsen Magnetic recording is demonstrated in principle by Valdemar Poulsen in his Telegraphone. Poulsen obtained a Telegraphone Patent in 1898, and later developed other magnetic recorders that recorded on steel wire, tape, or disks. None of these devices had electronic amplification, but the recorded signal was strong enough to be heard through a headset or transmitted on telephone wires. In 1900 at the World Fair in Paris, Poulsen had the chance to record the voice of Emperor Franz Josef of Austria which is widely believed to be the oldest surviving magnetic audio recording.

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