1. A method comprising: causing, at least in part, acquisition of voice data at an age estimator, wherein the age estimator comprises an input module and a computation module; calculating a first set of probability values using the computation module, wherein each of the probability values represents a probability that the voice data is in a respective one of a plurality of predefined age ranges, and the predefined age ranges are segments of a lifespan; deriving a second set of probability values using the computation module, by applying a correlation matrix to the first set of probability values, wherein the correlation matrix associates the first set of probability values with probabilities of the voice data matching individual ages over the lifespan; for each of the predefined age ranges, calculating a sum of the probabilities in the second set of probability values corresponding to the individual ages within the respective predefined age ranges using the computation module; and determining the predefined age range to associate with the voice data using the computation module based, at least in part, on the calculated sums of the probabilities.