Diffraction correction of frequency response for loudspeaker in rectangular baffle

• Autorzy: Dobrucki A.
• Języki publikacji: EN

Abstrakty

EN

The problem of diffraction correction of frequency response of loudspeaker in finite baffle was considered by H. Olson [2] in thirties of XX century. He found experimentally the frequency responses of corrections caused by interference of direct and diffracted waves. He predicted necessity of eccentric placing of loudspeaker in the baffle in order to avoid a deep dip in frequency response for frequency higher as twice as for lower limiting frequency of the baffle. However, the problem was never solved theoretically except the simplified case of loudspeaker centrally placed in circular baffle. In the paper a theory of diffraction on the baffle edge of the wave radiated by a point source eccentrically placed in the rectangular baffle is presented. The results of calculations of the diffraction corrections for various configurations of the source and the baffle are presented as well. The statistical dependence between irregularity of the frequency response of the diffraction correction above the lower limiting frequency of the baffle and standard deviation of the diffraction path is shown. The conclusions can be useful for design process of the baffles.

Słowa kluczowe

EN

rectangular baffle; frequency response of loudspeaker; diffraction correction

• Wydawca: Instytut Podstawowych Problemów Techniki PAN ; Komitet Akustyki PAN ; Polskie Towarzystwo Akustyczne
• Czasopismo: Archives of Acoustics
• Rocznik: 2006
• Tom: Vol. 31, No. 4
• Strony: 537--542
• Opis fizyczny: Bibliogr. 3 poz.

Twórcy

autor

Dobrucki A.

• Wrocław University of Technology, Institute of Telecommunications, Teleinformatics and Acoustics, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland,

Bibliografia

• [1] EUROPEAN STANDARD EN 60268-5:2003, Sound system equipment, Part 5: Loudspeakers, CENELEC 2003.
• [2] OLSON H., Elements of acoustical engineering, Van Nostrand Co., New York 1940.
• [3] PODREZ A., RENOWSKI J., RUDNO-RUDZIŃSKI K., Direct-radiator loudspeaker systems, Scientific Papers of the Institute of Telecommunications and Acoustics of Wrocław University of Technology, No. 26, Monographs No. 10, Wrocław 1977.