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The term phonation has slightly different meanings depending on the subfield of phonetics. Among some phoneticians, phonation is the process by which the vocal folds produce certain sounds through quasi-periodic vibration. This is the definition used among those who study laryngeal anatomy and physiology and speech production in general. Phoneticians in other subfields, such as linguistic phonetics, call this process voicing, and use the term phonation to refer to any oscillatory state of any part of the larynx that modifies the airstream, of which voicing is just one example. Voiceless and supra-glottal phonations are included under this definition.
Flexible liquid metal sensor and voiced / unvoiced speech recognition system
A flexible liquid metal sensor and a voiced / unvoiced speech recognition system. The flexible liquid metal sensor attached to the throat is configured to detect a hybrid-modal signal consisting of laryngeal low-frequency muscle movements and acoustic vibrations during voiced or unvoiced speech of a person. By designing discrete and continuous sensor layouts to accurately capture the frequency of laryngeal vibrations during phonation and spatial distribution characteristics of muscle movements, pressure information in different directions and at different positions is measured. Laryngeal data acquisition and filtering are achieved by means of a signal acquisition and analysis system, so as to construct a relational dataset between laryngeal acoustic-vibration hybrid-modal signals and expressed speech semantics. By establishing a deep neural network training model based on time-frequency features to train the relational dataset, the content expressed by a person during voiced or unvoiced speech can be recognized, thereby meeting the requirements of persons with speech impairments and the general population for conveying the expressed content in environments where speech is impaired.
Owner:CHINA ACAD OF LAUNCH VEHICLE TECH