Big Brother is Listening... to your voice

By analyzing "vocal biomarkers" like tone, speed, pauses, and emphasis on words, and other more nuanced markers in speech, software can detect mood, emotion, depression/anxiety and so on. Companies like CompanionMx and Voicesense have bold claims of detecting commercially useful personality profile of customer's voices, like investment style, risk of defaulting on a loan, or risk of an employee leaving.