Negative refractions by triangular lattice sonic crystals in partial band gaps*
Alagoz S.a)†, Alagoz B. B.b), Sahin A.a), Nur S.c)
       
Negative refraction patterns obtained for various sampled wave frequencies (partial band gap frequencies: 14650 Hz and 14900 Hz, and second band frequencies: 15700 Hz, 16700Hz, and 17500 Hz).