Treffer: Method of a voice source acoustic analysis in real time.

The problem of non-invasive analysis of the vocal function of the speech apparatus based on the speaker's speech signal is addressed. A new method of acoustic analysis of a pulse-type voice source based on a two-stage measurement procedure has been developed. The first stage of measurements provides for filtering of the voice excitation signal of the vocal tract is performed, while the second stage is responsible for converting this signal into a final pulse sequence, synchronous with the main tone of the speech signal. An example of technical (software) implementation of the developed method is considered, including the estimates of its computational complexity and performance (speed). The compatibility of the method with a soft real-time operating modes (with a delay measuring hundredths of a second) has been established. A full-scale experiment has been designed and conducted using the author-developed software. It was shown that for finite intervals of vocalization of the speech signal, the developed method guarantees stability of the repetition rate and shape of the excitation pulses, offering value in terms of providing accurate measurements of all key parameters of the speech vocal source (from the fundamental frequency to the amplitude disturbances (flickering) of the source pulses). The obtained results can be used to develop new and upgrade existing algorithms and technologies for speech signal synthesis and digital speech transmission over low-speed communication channels, as well as to create and improve medical diagnostics and voice therapy systems. [ABSTRACT FROM AUTHOR]