Acoustic metamaterial exhibiting four different sign combinations of density and modulus

Acoustic transmission line metamaterial with negative/zero/positive refractive index

(2010) Frédéric Bongard et al.   PHYSICAL REVIEW B

Composite Acoustic Medium with Simultaneously Negative Density and Modulus

(2010) Sam Hyeon Lee et al.   PHYSICAL REVIEW LETTERS

Acoustic metamaterial with negative modulus

(2009) Sam Hyeon Lee et al.   JOURNAL OF PHYSICS-CONDENSED MATTER

Acoustic metamaterial with negative density

(2009) Sam Hyeon Lee et al.   PHYSICS LETTERS A

Homogenization of acoustic metamaterials of Helmholtz resonators in fluid

(2008) Xinhua Hu et al.   PHYSICAL REVIEW B

One-dimensional structured ultrasonic metamaterials with simultaneously negative dynamic density and modulus

(2008) Y. Cheng et al.   PHYSICAL REVIEW B