Acoustic impedance variations of Helmholtz resonators of two plates with orifices inlet neck against the distance between the plates

• Autorzy: Birnbach M. , Śliwiński A. , Zachara S.
• Języki publikacji: EN

Abstrakty

EN

Experimental examinations of acoustic impedance of complex Helmholtz resonators of two plates with orifices inlet neck using Kundt tube procedure were performed. Few variants of model resonators were studied depending on the number of orifices (and their diameters) in the plates and against variations of the distance between the plates for a constant volume of the resonator cavity. A regular dependence of the acoustical impedance as well as the absorption coefficient against the distance between the inlet cover plates was observed for a given configuration of the orifices. Changes of the configuration (number of orifices their size and plane distribution in both plates and the relation between the lower and the upper one design) caused evident variations in acoustical properties, however no regular dependence could be found. Some configurations are more optimal than the others.

• Wydawca: Instytut Podstawowych Problemów Techniki PAN ; Komitet Akustyki PAN ; Polskie Towarzystwo Akustyczne
• Czasopismo: Archives of Acoustics
• Rocznik: 2004
• Tom: Vol. 29, no. 2
• Strony: 147--154
• Opis fizyczny: Bibliogr. 9 poz., rys., wykr.

Twórcy

autor

Birnbach M.

• Lyceum No 2 (secondary school), Al. Niepodległości 751, 81-838 Sopot, Poland

autor

Śliwiński A.

• University of Gdańsk, Institute of Experimental Physics, Wita Stwosza 57, 80-952 Gdańsk, Poland

autor

Zachara S.

• University of Gdańsk, Institute of Experimental Physics, Wita Stwosza 57, 80-952 Gdańsk, Poland

Bibliografia

• [1] CZUCHAJ J., ŚLIWIŃSKI A., ŚRODECKI K., Acoustical systems (panels) for industrial noise protection in very high hygienic requirements, Proc. Noise Control’98, Krynica, 1998, pp. 443–446.
• [2] CZUCHAJ J., ŚLIWIŃSKI A., ŚRODECKI K., ZACHARA S., Rezonansowe elementy dźwiękochłonne dostosowane do warunków wysokich wymagań higienicznych, 47 OSA’ 2000, Rzeszów–Jawor, pp. 455–462.
• [3] CZUCHAJ J., ŚLIWIŃSKI A., ŚRODECKI K., Noise sources and acoustic properties of workrooms in the plants of food-processing and pharmaceutical industry, Appl. Acoust., 62, 1141–1156 (2001).
• [4] CZUCHAJ J., ŚLIWIŃSKI A., ŚRODECKI K., ZACHARA S., Ochrona przed hałasem w warunkach wysokich wymagań higienicznych w zakładach pracy przemysłu spożywczego i farmaceutycznego, Wyd. Uniw. Gdańskiego, pp. 1–51, Gdańsk 2000.
• [5] KOZAKIEWICZ J., ŚLIWIŃSKI A., ZACHARA S., Absorbing properties variations of Helmholtz resonators by modification of their geometrical parameters, Proc. Noise Control’01, pp. 269–275, Kielce 2001.
• [6] RADENBERG R. T., A Helmholtz resonator with a lateral elongated orifice, Acustica, 86, 77–82 (2000).
• [7] FUCHS H. V., Helmholtz resonators revisited, Acustica, 86, 581–583 (2000).
• [8] ISO Standard 10534-1, Determination of sound absorption coefficient and acoustic impedance in impedance tubes, Pr. PN, Warszawa 1999.
• [9] B & K Standing wave apparatus, Type 4002, B & K. Techn. Review, September, 1969.