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Warianty tytułu
Konferencja
XIV International Conference Noise Control'07 (3-6.06.2007, Elbląg, Poland)
Języki publikacji
Abstrakty
In this article, active noise reduction system has been described. The ANR system was made on basis of finite impulse response filter and realised algorithms LMS or NLMS. The algorithms were implemented on the dSPACE card with floating-point processor TMS320C31. Researches were performed in the anechoic chamber and in the enclosure of dimension 4.4 x 3.05 x 3.2 m and reverberation time T=0.53 s. White noise filtered by third and octave filter with mid-band frequency 125 Hz was used for the experiments. The ANR system working in free field conditions (in the anechoic chamber) allowed to obtain the average acoustic pressure level reduction ranging from 9.1 to 24.1 dB for octave, and 14.7 to 23.1 dB for third octave. Measurements carried out in natural acoustics conditions in a selected room allowed to obtain the following values of average acoustic pressure level reduction: for octave from 2.2 to 14.2 dB, and for third octave from 6.4 to 19.8 dB. The result of experiments proved that the convergence time of NLMS algorithm was several times shorter than convergence time of LMS algorithm.
Wydawca
Czasopismo
Rocznik
Tom
Strony
205--213
Opis fizyczny
Bibliogr. 10 poz., rys., tab.
Twórcy
autor
- AGH University of Science and Technology, Department of Mechanics and Vibroacoustics Al. Mickiewicza 30, 30-059 Kraków, Poland, ghciesie@cyf-kr.edu.pl
Bibliografia
- [1] CIESIELKA W., Application of digital equalizers for sound synthesis, PhD thesis, AGH University of Science and Technology, Kraków 2002.
- [2] CIESIELKA W., GOŁAŚ A., Układ do aktywnej redukcji hałasu, Urząd Patentowy Rzeczpospolitej Polskiej przyznał patent P . 323959 dnia 10.08.2004 r, zgłoszenie wykonane do UP RP dnia 19.12.1997.
- [3] CZARNECKI S., Investigation of sound transmission properties of a medium resulting from sound wave compensation caused by other sound sources, J. Sound Vib., 11, 225.233 (1970).
- [4] ENGEL Z., Aktywne metody redukcji drgań i hałasu (rys historyczny, zagadnienia, problemy), Mat. I Szkoły Metody Aktywne Redukcji Drgań i Hałasu, Kraków. Rabka 1993.
- [5] HAYKIN S., Adaptive filter theory, Third Edition, Prentice Hall, Upper Saddle River, New Jersey 1996.
- [6] KUO M. S., MORGAN R. D., Active noise control systems, Algorithms and DSP Implementations, John Wiley & Sons. Inc. New York, NY, 1996.
- [7] LUEG P., Process silencing sound oscillations, US Patent No 2043416 Appl. 1934, Patented 1936. Priority Germany 1933.
- [8] NELSON P. A., ELLIOTT S. J., Active control of sound, Academic Press, San Diego 1992.
- [9] OLSON H. F., Electronic sound absorber, E.G. May, JASA, 25, 130.136 (1953).
- [10] VOGT M., Ogólne warunki kompensacji fazowej sygnałów w polu akustycznym, Archiwum Akustyki, 11, 141.157 (1976).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BAT8-0009-0029