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.
A new study by the Family Research Council has found that only 46 percent of children in the United States will reach the age of 17 living in intact homes with married biological parents. Among specific racial and ethnic groups, the highest rates for intact families are found among Asians (65.8 percent), while the lowest rates are found among Blacks (16.7 percent). âWe have never faced anything like this in human history,â Fagan said of the high numbers of children growing up in broken homes.