Abstract: Method and apparatus to measure jitter (period-to-period fluctuations in fundamental frequency) among the voices of suicidal, major depressed, and non-suicidal patients to predict near-term suicidal risk.

Abstract: A method for evaluating near-term suicidal risk by analysis of a series of spoken words includes converting the spoken series of words into a signal having characteristics indicative of said words as spoken, dynamically monitoring said signal to detect changes therein and identifying the person as having a relatively high near-term risk of suicide on the basis of such monitored changes in the signal relative to the speech of individuals in good mental health having no near-term suicidal risk.

Abstract: Method and apparatus to measure jitter (period-to-period fluctuations in fundamental frequency) among the voices of suicidal, major depressed, and non-suicidal patients to predict near-term suicidal risk.

Abstract: A method for evaluating near-term suicidal risk by analysis of a series of spoken words includes converting the spoken series of words into a signal having characteristics indicative of said words as spoken, dynamically monitoring said signal to detect changes therein and identifying the person as having a relatively high near-term risk of suicide on the basis of such monitored changes in the signal relative to the speech of individuals in good mental health having no near-term suicidal risk.

Abstract: A method for electronically detecting human suicidal predisposition by analysis of an elicited series of vocal utterances from an emotionally disturbed or distraught person independently of linguistic content of the elicited vocal utterance includes converting the utterance into an electrical signal having time varying amplitude and frequency which are representative of the utterance, filtering frequency components of the signal above and below pre-selected frequencies to obtain a signal within the pre-selected frequencies, filtering non-repetitive components having amplitude above about 90 percent of average amplitude of the signal out of the signal, filtering repetitive signal components having frequency outside about 90 percent of frequency band width of the signal out of the signal and identifying as suicidally predisposed a person from whom the vocal utterance emanated if signal amplitude exhibits substantially non-instantaneous decays upon conclusion of each utterance or if amplitude of signal amplitude

Abstract: Method and apparatus to measure jitter (period-to-period fluctuations in fundamental frequency) among the voices of suicidal, major depressed, and non-suicidal patients to predict near-term suicidal risk.

Abstract: A method for evaluating near-term suicidal risk by analysis of a series of spoken words includes converting the spoken series of words into a signal having characteristics indicative of said words as spoken, dynamically monitoring said signal to detect changes therein and identifying the person as having a relatively high near-term risk of suicide on the basis of such monitored changes in the signal relative to the speech of individuals in good mental health having no near-term suicidal risk.

Abstract: A method for detecting suicidal predisposition in a person by securing an utterance from the person, identifying the person as being suicidally predisposed if the utterance decays substantially non-instantaneously upon conclusion and identifying the person as being suicidally predisposed if signal amplitude modulation during the utterance is low and identifying the person as being suicidally predisposed if variation in fundamental frequency during the utterance is low and identifying the person as being suicidally predisposed if frequency of amplitude modulation during the utterance is low.

Abstract: A method for detecting suicidal predisposition in a person by securing an utterance from the person, identifying the person as being suicidally predisposed if the utterance decays substantially non-instantaneously upon conclusion and identifying the person as being suicidally predisposed if signal amplitude modulation during the utterance is low. Low value of amplitude modulaation (of speech envelope waveform), as well as slow decay at the end of each utterance, are indicators of emotional disturbance, special filtering of repetitives and non-repetitive components enhanced the waveform for consideration.

Abstract: A method for detecting suicidal predisposition in a person by securing an utterance from the person, identifying the person as being suicidally predisposed if the utterance decays substantially non-instantaneously upon conclusion and identifying the person as being suicidally predisposed if signal amplitude modulation during the utterance is low.