Archives of Acoustics, 32, 4, pp. 895-901, 2007

Influence of phase correction on the acoustic impedance of circular planar sources

Paweł KOS
University of Rzeszów, Institute of Technology

Lucyna LENIOWSKA
University of Rzeszów, Institute of Technology

In this work, the influence of velocity distribution phase correction on the acoustic impedance of a circular source located in an infinite baffle is analyzed. It has been observed that by turning back a velocity distribution phase by modifying the radiating surface shape in a special way, obtaining a more coherent acoustic radiation is possible. This problem has been analyzed during earlier investigations, with attention focused on the directivity of some acoustic sources [1]. The aim of this paper is to calculate the acoustic impedance which allows the examination of such a ``phase correction'' effect on the acoustic radiation of the considered sound sources. The result was achieved by numerical calculation with the use of Hankel representation of the acoustic impedance.
Keywords: sources of high directivity, phase correction, acoustic impedance
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