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.
Generally speaking, most prospective homeowners can afford to mortgage a property that costs between two and two and one-half times their gross income. Under this formula, a person earning $100,000 per year can afford to mortgage between $200,000 and $250,000. But this calculation is only a general guideline.