ACOUSTIC SPECIFICATION OF SPEECH.
Abstract
Research at the Speech Transmission Laboratory (Dept. of Speech Communication) during the calender year 1967 is reviewed. The general descriptive theory of speech analysis is discussed. Speech waveforms were studied with special attention to irregularities of the voicing mechanism. The theory for predicting vocal tract resonances from resonator shape data was further developed with special attention to perturbation techniques. Several studies of speech production on the neural mechanical and acoustical stages were undertaken. These contribute to the understanding of coarticulation reduction and reorganization as principles whereby the continuous and context-variable speech pattern may be inferred from discrete neural commands on a level higher than the activities at the individual speech muscles as studied by EMG. These principles were applied to intonation studies. A theory of intonation is developed and tested by an analysis-by-synthesis technique and correlated to EMG data of the crico-thryoid and vocalis muscles. Experiments were made on the perception of time-varying formant structures and sine wave ramps. The new computer controlled synthesizer OVE III replacing the previous OVE II is now in use. A program for pitch contour matching is described. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 22, 1968
- Accession Number
- AD0668548
Entities
People
- C. G. M. Fant
Organizations
- Royal Institute of Technology