In a study published in «Forensic Linguistics» in 2000, a group of volunteers who knew one another listened to anonymous recordings of the voices of various members of the group. (scientificamerican.com)
A tape recording of your voice played periodically may be comforting if your cat is particularly attached to you, or is shy around strangers. (felinedocs.com)
Researchers studying 48 wild elephant families played recordings of voices from two ethnic groups with distinct languages in Kenya's Amboseli National Park. (discovermagazine.com)