A computer model for calculating the speech transmission index using the direct STIPA method

• Autorzy: Dziechciński Paweł
• Języki publikacji: EN

Abstrakty

EN

Computer models currently used for the simulation of the speech transmission index (STI) calculate the STI using the statistical method or are based on numerically determined impulse response of the transmission channel. The limitation of both these computational methods is that they do not allow to take into account the nonlinear properties of the transmission channel and fluctuating background noise. This paper presents a proposition of a model based on the direct STIPA method. This model allows computer simulations of STIPA for distributed sound systems, and enables analysis to include both changes in signal dynamics and fluctuating background noise. The paper presents the idea of the model and validation of its basic elements - the generator and the analyser. The possibilities of using the model for computer simulation of outdoor public address systems were also discussed.

Słowa kluczowe

EN

speech transmission index; STIPA; attenuation of sound by the atmosphere

PL

wskaźnik transmisji mowy; STIPA; pochłanianie dźwięku przez atmosferę

• Wydawca: Poznan University of Technology. Institute of Applied Mechanics
• Czasopismo: Vibrations in Physical Systems
• Rocznik: 2019
• Tom: Vol. 30, nr 1
• Strony: art. no. 2019129
• Opis fizyczny: Bibliogr. 11 poz., rys., wykr.

Twórcy

autor

Dziechciński Paweł

• Wrocław University of Science and Technology, Department of Acoustics and Multimedia, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław

Bibliografia

• 1. S. Brachmanski, Estimation of logatom intelligibility with the STI method for Polish speech transmitted via communication channels, Archives of Acoustics, 29(4) (2004) 555 - 562.
• 2. S. Brachmanski, Experimental comparison between speech transmission index (STI) and mean opinion scores (MOS) in rooms, Archives of Acoustics, 31(4) (2006) 171 - 176.
• 3. S. Brachmański, Wybrane zagadnienia oceny jakości transmisji sygnału mowy, Oficyna Wydawnicza Politechniki Wrocławskiej, Wrocław 2015.
• 4. P. Dziechciński, M. Hadyk, Projektowanie systemów rozgłoszeniowych na otwartych peronach kolejowych, Postępy akustyki 2017, red. D. Bismor, Gliwice: Polskie Towarzystwo Akustyczne Oddział Górnośląski, (2017) 197 - 208.
• 5. T. Houtgast, H. J. M. Steeneken, The Modulation Transfer Function in rooms acoustics as a predictor of speech intelligibility, Acustica, 28(1) (1973) 66 - 73.
• 6. IEC 60268-16:2011 - Sound system equipment - Part 16: Objective rating of speech intelligibility by speech transmission index.
• 7. ISO 9613-1:1993, Acoustics — Attenuation of sound during propagation outdoors - Part 1: Calculation of the absorption of sound by the atmosphere.
• 8. ISO 9613-2:1996, Acoustics — Attenuation of sound during propagation outdoors - Part 2: General method of calculation.
• 9. ISO 717-1:2013, Acoustics — Rating of sound insulation in buildings and of building elements - Part 1: Airborne sound insulation.
• 10. M. Schroeder, Modulation Transfer Functions: Definition and Measurement, Acustica, 49 (1981).
• 11. H. J. M. Steeneken, T. Houtgast, A physical method for measuring speech transmission quality, J. Acoust. Soc. Am., 67(1) (1980) 318 - 326.

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).