Resumen de Active control of sound transmission into an acoustic cavity surrounded by more than one flexible plate
This paper presents an investigation into the active control of sound transmission into a structural-acoustic coupled system. An enclosure with four acoustically rigid walls and two flexible plates is considered. One of the two plates through which a harmonic sound wave is transmitted into the enclosure, is called the incident plate, and the other as the receiving plate. Based on a fully coupled vibro-acoustic model, seven different control strategies, i.e. control configurations, are considered. They are: (a) use of the incident plate actuator, (b) applying acoustic control source in the cavity (called as cavity control), (c) use of the receiving plate actuator, (d) hybrid control system combining the incident plate actuator and the cavity control source, (e) hybrid control system combining the receiving plate control and the cavity control source, (f) simultaneous use of both the incident plate actuator and the receiving plate actuator, and (g) use of the combined acoustic actuator and structural actuators on both flexible panels. The effectiveness and performance of the control system corresponding to each configuration are compared and discussed through numerical simulations. The results show that two control system configurations, that is, the hybrid control system combining the incident plate actuator and the cavity control source and simultaneous use of both the incident plate actuator and the receiving plate actuator are desirable configurations in terms of the acoustic potential energy inside the enclosure.
