A Columbia Business School study recorded students reading a passage before being randomly assigned to a high- or low-rank status and then heading into a negotiation. Those who were given more power raised the pitch of their voices more, varied how loud their voices were, and became less monotone.
Your marriage’s stability
Researchers recorded couples in marriage therapy sessions for two years and then used a computer to analyse voice features like jitter, loudness and pitch in a study printed in Proceedings of Interspeech. Looking at the couples’ marital statuses five years later, researchers found that a computer’s analysis of tone of voice was better at predicting whether the relationship got better or worse than an analysis of the words therapists used to describe the sessions.
If you’re “just friends”
When talking to someone they’ve been romantically involved with for less than a year, people tend to sound sexier and more pleasant than when talking to a same-sex platonic friend, found researchers in Albright College. The differences were obvious enough that independent raters were able to identify if the caller was talking to a friend or lover. The researchers say this might be because people change their voices to communicate their relationship status.