Transient is the most hyped, abused and trendy word in GS. A transient is a short-duration signal that represents a nonharmonic attack phase of a sound source. It contains a high degree of nonperiodic components and a higher magnitude of high frequencies than the harmonic content of that sound.
But like any estimate, it's based on some rounded numbers and rules of thumb. For example, this mortgage affordability calculator assumes that your monthly mortgage payment should be no more than 28% of your monthly income, to leave enough money for other expenses and investments you'll want to make.
There are lots of financial measures to meet to land the mortgage. The usual rule of thumb is that you can afford a mortgage two to 2.5 times your income. At $60,000, that's a $120,000 to $150,000 mortgage. You also have to be able to afford the monthly mortgage payments, however.