Comparison of Methods for Measuring Reverberation Time

• Autorzy: Melnyk M. , Kernytskyy A. , Lobur M.
• Języki publikacji: EN

Abstrakty

EN

The article presents the results of an experimental evaluation of the reverberation time of the lecture auditorium in the Lviv Polytechnic National University. For their further analysis, a sub-system of batch processing of audio files with a registered response of the room for excited impulse noise has been developed. To determine the bypass signal, Schroeder method was used, and the least squares method was improved by pre-processing of the signal using the MM method. The influence of the number of neighboring points of the MM method on the accuracy of the reverberation time by the least squares method is investigated. A comparison of the Schroeder method and the least squares method is made, which makes it possible to establish that Schroeder method is more precise. The average error of this method for 6 experiments against the Dirac system was 0.02 sec, whereas for the least squares method it was 0.06 seconds. The developed subsystem of the batch analysis of the registered response of the premises for pulsed noise makes it possible to increase the speed and efficiency of processing the results of experiments.

Słowa kluczowe

EN

reverberation time; accuracy of reverberation time; sub-system of batch processing; bypass signal; Schroeder method; MM method

• Wydawca: Oficyna Wydawnicza Politechniki Warszawskiej
• Czasopismo: Machine Dynamics Research
• Rocznik: 2018
• Tom: Vol. 42, No. 2
• Strony: 27--34
• Opis fizyczny: Bibliogr. 5 poz., fot., schem., tab., wykr.

Twórcy

autor

Melnyk M.

• Lviv Polytechnic National University, Department of Computer-Aided Design

autor

Kernytskyy A.

• Lviv Polytechnic National University, Department of Computer-Aided Design

autor

Lobur M.

• Lviv Polytechnic National University, Department of Computer-Aided Design

Bibliografia

• 1. Beranek, L. L. and Mellow, T. J. (2012). Acoustics: Sound fields and transducers. Oxford 1st Edition.
• 2. Melnyk, M., Kernyskyy, A., and Pukach, P. (2017). Development of subsystems for reverberation time definition in lecture auditorium. 2017 14th International Conference The Experience of Designing and Application of CAD Systems in Microelectronics (CADSM).
• 3. Sabine, W. C. and Shankland, R. S. (1964). Collected papers on acoustics. The Physics Teacher.
• 4. Schlittgen, R. (1997). Chris chatfield: The analysis of time series. an introduction. 5th edition, vii 283 pp. chapman & hall 1996, £ 18.99 (paperback). Biometrical Journal, 39 (4): 508–508.
• 5. Schroeder, M. R. (1965). New method of measuring reverberation time. The Journal of the Acoustical Society of America, 37 (6): 1187–1188.