Patent US 4,490,840

Vocal sounds of organisms, particularly humans, may be analyzed for characteristics defined as voice-style (resonance, quality), speech-style (variable-monotone, choppy-smooth, etc.), and perceptual-style (sensory-internal, hate-love, etc.). The amount of each characteristic is calculated from relative and difference values of measured elements including six spectral peaks and pauses. Coefficient tables indicate the relative contribution of measured elements.