Glottal-to-Noise Excitation Ratio – a New Measure for Describing Pathological Voices

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Abstract:

In this article a new acoustic parameter for the objective description of voice quality is introduced. It is based on the correlation coefficient for Hilbert envelopes of different frequency bands. The parameter indicates whether a given voice signal originates from vibrations of the vocal folds or from turbulent noise generated in the vocal tract and is thus related to (but not a direct measure of) breathiness. Therefore it is named Glottal-to-Noise Excitation Ratio (GNE Ratio). GNE is compared to HNR (Harmonics-to-Noise Ratio) and NNE (Normalized Noise Energy), existing measures also sensitive to additive noise (turbulence). Experiments with artificial signals show that only the GNE is almost independent of frequency modulation noise (jitter) and amplitude modulation noise (shimmer).

Document Type: Research Article

Publication date: July 1, 1997

More about this publication?
  • 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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