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Real-Life Activities

Real-Life Math

As a sound designer, you need to calculate the sound delay between the house speakers and the additional rental speakers just three feet away.

Knowing that in dry air at 68-degrees Fahrenheit, sound travels at a speed of roughly 1,115 feet per second, you need to determine how long the sound delay will be.

V = velocity (speed)

X = distance

T = time

"One common equation is V=X/T," says Ernie Yezzi, a sound technician in Indiana.

But you already know the velocity. You need to figure out the time delay.

If the distance is three feet, and the velocity is 1,115 feet per second, how long is the time delay?