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.
It shows (admittedly, unsurprisingly) that mortgage-free homes tend to have older principal householders than homes that still have mortgages left to pay. If you live in a home you own, I hope youâre one of the 32 percent that have paid off your mortgage. Given your age, though, that seems unlikely.2 percent of households that pay rent have monthly housing costs that are more than 30 percent of their income. Thereâs one other piece of data that can help us build up a clearer picture of American homeowners. The American Community Survey also has tracks the age of the main householder in owner-occupied homes.