What Is Layered Voice Analysis?
Layered Voice Analysis (LVA) is a voice-based technology marketed for detecting emotions and deception. Developed by Nemesysco, Ltd. (Israel), it applies algorithms to the voice signal. Independent research has consistently found its validity for deception detection to be poor to non-existent. The U.S. Department of Defence prohibits voice-based deception detection devices.
References
See: Damphousse et al. (2007); Harnsberger et al. (2009).