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Speech Rate Meter

IP.com Disclosure Number: IPCOM000096941D
Original Publication Date: 1962-Feb-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

Dersch, WC: AUTHOR

Abstract

This meter determines variations in the speech rate of individuals. The appearance of voicing in the spoken words is used as the measure of speech rate. The signal from microphone 1 passes into voicing detector 3 through amplifier 2. Transistor 4, which is biased off until receipt of a pulse indicating voicing from detector 3, clips the detected voicing signal. The clipped signal is differentiated in circuit 5 and passed into a one-shot multivibrator 6. The constant area spike pulse leaving multivibrator 6 is rate integrated in circuit 7, at a time constant of from one to five seconds, and read on meter 8 which is calibrated in words per minute.

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Speech Rate Meter

This meter determines variations in the speech rate of individuals. The appearance of voicing in the spoken words is used as the measure of speech rate. The signal from microphone 1 passes into voicing detector 3 through amplifier 2. Transistor 4, which is biased off until receipt of a pulse indicating voicing from detector 3, clips the detected voicing signal. The clipped signal is differentiated in circuit 5 and passed into a one-shot multivibrator 6. The constant area spike pulse leaving multivibrator 6 is rate integrated in circuit 7, at a time constant of from one to five seconds, and read on meter 8 which is calibrated in words per minute.

In voicing detector 3, the input signals representative of speech are applied to a pair of signal channels having like characteristics. This is for the purpose of detecting the envelopes of the electronic signals representing the asymmetric voicing sound wave. In each signal channel, a diode clamp 11 or 12 is used to remove signal components of a specific polarity, the diodes being oppositely poled as between the two channels. The potentiometer 13 is set to give a zero output for nonvoiced sounds.

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