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.
Using the middle of the road formula or rule of thumb, that means the median household in the high income states can afford a mortgage around 2.5 X $60,000 or $150,000. Unfortunately, the median house price (half above, half below) in these states is still over $300,000.