IMF2017

Phononic crystals (PCs) are media with periodically varying elastic properties and mass densities. In present paper we report the numerically investigations the spatio-spectral sound transmission properties and complete bandgaps of ferroelectric based 2D PCs slabs with Archimedes and Fibonacci spiral holes and present a discussion on the effects of negative refraction on the spatio-spectral selectivity of PCs. The transmission and reflection properties of periodic and quasi-periodic structures by using FDTD method were calculated. Also, the dominant mechanisms of acoustic losses in Archimedes and Fibonacci spiral structures are discussed. This study could be indispensable to practical applications of PCs slabs as band gap tuning.