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.
1 Non-Hispanic whites make up 63 percent of the U.S.; Hispanics, 17 percent; blacks, 12.3 percent; Asians, 5 percent; and multiracial Americans, 2.4 percent. 2  About 353 of the nation's 3,143 counties, or 11 percent, are now majority-minority.. Among the under-5 age group, 22 percent live in poverty, typically in more rural states such as Mississippi, Arkansas and Louisiana. 2  Black toddlers were most likely to be poor, at 41 percent, followed by Hispanics at 32 percent and whites at 13 percent. 3  Asian toddlers had a poverty rate of 11 percent.