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.
Lender's Determination. Mortgage lenders decide if you can afford a payment based on a stricter set of rules. Bank rules usually state that the borrower's total monthly payment should be no more than 28 percent (.28 in decimal form) of his gross income each month. The amount of a mortgage payment you can afford is equal to your salary times .28 divided by 12. By this guideline, if you make $35,000 per year (before taxes) you can afford a mortgage payment of $816.67 per month or less, using the formula (35,000 * .28)/12.