Robert Lüdtge
Robert Lüdtge (born September 11, 1845 in Berlin , † September 21, 1880 in Neuendorf near Potsdam ) was a German physicist and inventor of an electric microphone .
Lüdtge came from a family of manufacturers, he studied in Berlin and did his doctorate on a subject in the field of magnetism . After working as a physicist in industry for several years, he took over the "Microscopic Aquarium of Dr. Zenker", a kind of institute for scientific demonstrations. In 1878 Lüdtge had a microphone patented. Its operating principle was the change of the sound waves caused by contact resistance two touching metal plates or a plate and a metallic pin. The microphone was actually produced and used for house phone connections. The Lüdtges patent expired two years after his untimely death and David Edward Hughes ' carbon microphone, presented by David Edward Hughes in 1878 and working on the same principle, quickly made Lüdtges' invention forgotten, especially since Hughes had expressly waived the patenting of his invention.
| personal data | |
|---|---|
| SURNAME | Lüdtge, Robert |
| BRIEF DESCRIPTION | German physicist |
| DATE OF BIRTH | September 11, 1845 |
| PLACE OF BIRTH | Berlin |
| DATE OF DEATH | September 21, 1880 |
| Place of death | Neuendorf near Potsdam |