A geometrical-numerical method for the determination of the acoustic field properties related to the directions of reflected waves

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Authors

  • Maria TAJCHERT Institute of Radioelectronics, Warsaw Technical University, Poland

Abstract

A method for theoretical determination of the field in enclosures is presented. To analyse the directivity of the field, the spatial distributions of the directions of the reflected waves and their energy are calculated using the geometrical-numerical method. Diffusion coefficients of the directions, energy and ray energy are introduced. These coefficients characterize in general the directional properties of the field at a given point and determine in detail the values of energy reaching the observation point from different parts of the space. An algorithm for a computer program and the results of numerical calculations for a rectangular room which illustrate the effect of the different parameters of the source-room-observation point system on the directional properties of the field are given.

References

[1] V. FURDUYEY, Izmerenye difusnosti zvukovo pola v pomeshchenyakh metodom napravlennove mikrofona, Akust. Zh., 5, 1 (1960).

[2] I. MALECKI, Theory of waves and acoustic systems (in Polish), PWN, Warsaw 1964.

[3] M. TAJCHERT, Investigation of the directional properties of the acoustic field in perpendicular-walled enclosures using the geometrical method of field analysis (in Polish), Archiwum Akustyki, 13, 4 (1978).

[4] H. KUTTRUFF, Room acoustics, Applied Science Publishers Ltd., London 1973.