The richness of human vocal communication turns partly on our ability to control pitch, scientists say. Consider the difference you hear between "Let's eat, Grandma" and "Let's eat Grandma."
Scientists have identified the brain cells that detect pitch changes in speech, allowing us to understand whether someone is asking a question or making a statement.
If you're trying out for a job, the one judging you may not be a person — it could be a computer. Algorithms are evaluating human voices to determine which ones are engaging, calming and trustworthy.
