||Impinging jets are encountered in many industrial applications such as the VMC ventilation where
the generated noise by these jets is of high interest fundamentally and should be reduced or
suppressed. The vortex dynamics and the interaction between the vortical structures and the
impinging wall should be understood in order to control the aero-acoustic coupling between the
shear layer oscillation and the acoustic modes (self-sustained tones). Several parameters influence
these phenomena such as the Reynolds number and the plate to nozzle distance. In this study, a
plane jet issuing from a rectangular nozzle and impinging a plate (two cases, a slotted and a nonslotted
plates) is considered for Re = 3900 and Re = 14300.
Both the sound pressure level and the vibration of the impinged plate are obtained using a
microphone and accelerometers, respectively. In each case, the spectra of the vibration of the plate
and the acoustic field are presented for the slotted and the non-slotted plates. The present results
evidenced that the self-sustained tones generated in the case of a slotted plate are responsible of
the plate vibration at well-defined frequencies.