Reflection and transmission of sound by a slotted wall separating two moving fluid streams

Raymond L. Barger
naca-tn-4295
Jun 1958


The reflection and transmission coefficients have been determined for a plane sound wave incident on a slotted wall separating two moving fluid streams. This acoustics problem is related to the aerodynamic problem of determining the tunnel-wall interference on an oscillating airfoil in a slotted-throat wind tunnel in that the same boundary condition is involved with one of the two streams at the boundary having zero velocity.

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