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Abstract
The quality of voice messages in speech reinforcement and public address systems is often poor. The sound engineering projects of such systems take care of sound intensity and possible reverberation phenomena in public space without, however, considering the influence of acoustic interference related to the number and distribution of loudspeakers. This paper presents the results of measurements and numerical simulations of the impact of the multiplication of sound sources in a room on phoneme formants distribution playing a crucial role in voice message recognition. Distance measures characterizing phoneme distortions in speech reinforcement systems (SRS) are discussed in the paper. The analysis shows a need to complement the existing acoustic standards recommending an indirect estimation of intelligibility on the basis of modulation transfer function (MTF) measurements, with newly developed measures based on the linear predictive coding (LPC) approach related directly to distortion of representative speech elements.
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- Category:
- Monographic publication
- Type:
- rozdział, artykuł w książce - dziele zbiorowym /podręczniku w języku o zasięgu międzynarodowym
- Title of issue:
- W : Postępy Akustyki = Progress of Acoustics strony 167 - 178
- Language:
- English
- Publication year:
- 2015
- Bibliographic description:
- Kochańska I., Lasota H.: PHONEME DISTORTION IN PUBLIC ADDRESS SYSTEMS// W : Postępy Akustyki = Progress of Acoustics/ ed. Krzysztof J. Opieliński Wrocław: Polskie Towarzystwo Akustyczne, 2015, s.167-178
- Verified by:
- Gdańsk University of Technology
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