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.
While 22.4 percent of whites have a bachelorâs degree, the rate for Native Americans is 12.0 percent. As compared with whites, a greater share of American Indians have GEDs or have not completed high school. Of American Indians, 13.5 percent are high school dropouts, compared with 7.1 percent of whites.he analysis below compares the employment rates (i.e., the employment-to-population ratios) of whites and American Indians in their prime working ages (between 25 and 54 years old), when their employment rates should be highest. It uses data from the 2009â2011 American Community Survey (ACS).