Valdemar Poulsen Summary

Valdemar Poulsen 1869-1942 Danish engineer who invented the telegraphone, the first practical device for recording and replaying sound—the forerunner of modern audio and video recording systems... Read more

Valdemar Poulsen was a Danish engineer who invented the magnetic recorder in 1898. His ideas were the basis of magnetic recording and led to crucial developments in communications and computer technol... Read more