Underwater acoustic absorption by collocated smart materials

Collocated smart structures provide the most effective technique of influencing the stimuli. Such systems can also be used for absorbing underwater acoustic waves. A collocated system is designed by mounting piezoelectric sensor on a multilayer PZT discs stack. Using PZT sensor for narrowband response and modified lead titanate sensor for broadband response, the effectiveness of these smart structures in absorbing acoustic waves is experimentally determined by using an acoustic tube.