Pitch Synchronous Gating in a Time-Domain Analysis of Vowel Waveforms
The time intervals between zero crossings of a voiced speech wave are extremely sensitive to noise and changes in the glottal periodicity. Statistics of these intervals can be made less dependent on such factors by processing the waveform pitch synchronously. This processing was particularly successful for open vowels in reducing the noisiness and variability of a two dimensional statistical display of the time intervals between zero crossings of the waveform. A parallel perceptual experiment was performed applying pitch synchronous gating to the clipped waveforms of isolated vowels. The quality and intelligibility of these vowels was slightly improved. The results of both these experiments point to the relative importance of the early part of each glottal period as opposed to the later part in carrying reliable information concerning the resonance characteristics of the supra-glottal articulators.
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Document Type: Research Article
Publication date: May 1, 1975
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- Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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