Magnetic Storage. Piano wire, an electromagnet and a microphone. This was all the Danish inventor Valdemar Poulsen (1869-1942) needed in 1898 to create the telegraphone or wire recorder â the first known device capable of recording sound magnetically.agnetic Storage. Piano wire, an electromagnet and a microphone. This was all the Danish inventor Valdemar Poulsen (1869-1942) needed in 1898 to create the telegraphone or wire recorder â the first known device capable of recording sound magnetically.
And as of 2016, there are about 2.3 million home-schooled students in the United States (Brian, 2016). The studies found that of these children, 83 percent were White, 5 percent were Black, 7 percent were Hispanic, and 2 percent were Asian or Pacific Islander.
The economy is struggling and, as a result, more and more Americans have turned to the government for welfare. The percentage of Americans now receiving a federally-funded âmeans-tested programâ now stands at 35.4%. When you add pensions, unemployment, Social Security, and Medicare to the mix, the percentage of Americans relying on government for part or all of their subsistence is 49.5% of the American population.