Voice Risk Analysis takes this concept and extends it to the automated detection of deception (lying) over telephone calls. Is this completely unbelievable on the face of it? Not completely - you may have occasionally encountered people who sound nervous when trying to lie. However, pricey products have been sold based on extrapolating this a step further to claim that simply by analyzing telephone speech to a finer level of detail (e.g. looking for microtremors) one can detect stress and even lying in the general population.
The Guardian (a center-left news organization in the UK) has a news article on the results of practical trials conducted by the British government using a commercial VRA system to attempt to catch people lying in telephone interviews regarding government-funded benefits. After analyzing the results from 45,000 calls, the bottom line was that the system did not provide enough value to justify its cost. Given the history of VRA and my own understanding of speech science, I am not surprised at all by the findings. Hopefully, as a matter of public policy, this will put an end to government purchases of VRA technology until such a time as it is proven by peer-reviewed studies to work for the application(s) it is intended for.