Details here. For the five tone durations, the mean correlation coefficient was 0.59, and was still significant when the authors adjusted for a measure of general intelligence.
Suddenly "what time is it?" isn't such an innocuous question.
Kramer P, Bressan P, Grassi M (2011) Time Estimation Predicts Mathematical Intelligence. PLoS ONE 6(12): e28621. doi:10.1371/journal.pone.0028621