Natural structures evolve to survive and sustain. Often these structures have combinations of beneficial characteristics commonly called multifunctional. Exciting progress is being made to develop engineered systems with ideas taken from the natural world. Multifunctional systems are complex and thus very challenging in their investigation and call for highly inter-disciplinary effort encompassing breadth of science and engineering disciplines including biological sciences. This paper illustrates an effort to mimic one such multifunctional natural structure and investigate the acoustics characteristics of the same. Test results demonstrated that acoustic mass law holds good for such a complex system in a general sense. Contrary to the mass law, the rate of increase in transmission loss due to inclusion of interstitial fluid was found to be not directly proportional to the rate of increase in mass per unit area.