In a method for remotely determining information relating to a person's emotional state, an waveform energy having a predetermined frequency and a predetermined intensity is generated and wirelessly transmitted towards a remotely located subject. Waveform energy emitted from the subject is detected and...http://www.google.com.au/patents/US5507291?utm_source=gb-gplus-sharePatent US5507291 - Method and an associated apparatus for remotely determining information as to person's emotional state
