"Female voices do however appear to have an advantage in that they can portray a greater range of urgencies because of their usually higher pitch and pitch rang

"Female voices do however appear to have an advantage in that they can portray a greater range of urgencies because of their usually higher pitch and pitch range. An experiment is reported showing that knowledge about the sex of a speaker has no effect on judgements of perceived urgency, with acoustic variables accounting for such differences." https://www.ncbi.nlm.nih.gov/pubmed/14965452 https://www.ncbi.nlm.nih.gov/pubmed/14965452