TY - GEN
T1 - Doubly negative acoustic metamaterial with coupled membrane Resonator
AU - Ma, Guancong
AU - Yang, Min
AU - Yang, Zhiyu
AU - Sheng, Ping
PY - 2013/9/15
Y1 - 2013/9/15
N2 - We demonstrate that a single resonating unit can exhibit simultaneously negative effective mass density and effective bulk modulus. The metamaterial has a symmetric design: it comprises two decorated elastic membranes mounted on two ends of a hollow cylindrical tube. The two membranes are then connected by a rigid ring, forming a single resonating cell. Impedance measurements show that this system's transport property is governed by three eigenmodes in the sub-kilo hertz regime. Displacements profiles obtained with a laser vibrometer reveal that these eigenmodes are dipolar and monopolar in their symmetry, respectively. Homogenization is performed to extract the effective parameters. Double negativity is confirmed. The results also shed light on the special transport behavior of the metamaterial. Excellent agreement between experiment and theory is achieved. Copyright
AB - We demonstrate that a single resonating unit can exhibit simultaneously negative effective mass density and effective bulk modulus. The metamaterial has a symmetric design: it comprises two decorated elastic membranes mounted on two ends of a hollow cylindrical tube. The two membranes are then connected by a rigid ring, forming a single resonating cell. Impedance measurements show that this system's transport property is governed by three eigenmodes in the sub-kilo hertz regime. Displacements profiles obtained with a laser vibrometer reveal that these eigenmodes are dipolar and monopolar in their symmetry, respectively. Homogenization is performed to extract the effective parameters. Double negativity is confirmed. The results also shed light on the special transport behavior of the metamaterial. Excellent agreement between experiment and theory is achieved. Copyright
UR - https://www.proceedings.com/21903.html?searchid=49843&search_query=Congress+and+Exposition+on+Noise+Control+Engineering+2013
UR - https://www.scopus.com/pages/publications/84904513151
M3 - Conference proceeding
AN - SCOPUS:84904513151
SN - 9781632662675
VL - 5
T3 - International Congress and Exposition on Noise Control Engineering, INTER-NOISE
SP - 4035
EP - 4039
BT - 42nd International Congress and Exposition on Noise Control Engineering 2013, INTER-NOISE 2013
PB - Institute of Noise Control Engineering
T2 - 42nd International Congress and Exposition on Noise Control Engineering 2013: Noise Control for Quality of Life, INTER-NOISE 2013
Y2 - 15 September 2013 through 18 September 2013
ER -