





Volume 5, Number 1, Winter 1997
DIFFRACTION OF A SPHERICAL ACOUSTIC WAVE
NEAR AN ABSORBING FINITEPLANE
S. ASGHAR AND TASAWAR HAYAT
Abstract. An exact solution for the problem of diffraction
of a spherical sound wave (emanating from a point source)
near an absorbing strip introducing the KuttaJoukowski condition
is obtained. The two faces of the strip have impedance
boundary conditions. The problem which is solved is a mathematical
model for a noise barrier whose surface is treated
with acoustically absorbing materials. This consideration is
also important in the sense that a point source is regarded as
a fundamental radiating device. It is found that the field produced
by the KuttaJoukowski condition will be substantially
in excess of that in its absence when the source is near the
edge.
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