You hear a phone ring or a dog bark. Is it yours or someone else's? You hear footsteps in the night—is it your child, or an intruder? Friend or foe? The decision you make will determine what action you take next. Researchers ...
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Frequency is the number of occurrences of a repeating event per unit time. It is also referred to as temporal frequency. The period is the duration of one cycle in a repeating event, so the period is the reciprocal of the frequency. For example, if a newborn baby's heart beats at a frequency of 120 times a minute, its period (the interval between beats) is half a second.
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