Tunable sub-wavelength acoustic energy harvesting with a metamaterial plate

We report theoretically on sub-wavelength acoustic energy harvesting (AEH) using a thin acoustic metamaterial (AM) made of spring-mass resonators attached to the surface of a homogeneous elastic thin plate. Considering an incident acoustic wave hitting the AM plate, tunable and highly efficient AEH is achieved by introducing a sub-wavelength defect inside the AM structure to confine the elastic energy into a spot which is then electromechanically converted into electrical power using a ceramic PZT patch. Several types of sub-wavelength cavities capable of confining acoustic energy at the sonic regime are extensively investigated for the optimization of AEH. Three analytical approaches—band structure, sound transmission loss and electrical-to-mechanical energy conversion—are proposed to fully describe the system interaction with the acoustic wave and quantify the AEH performance. The computed results show that an average power of 18 μW can be harvested using a specific cavity design of only size from an incident acoustic wave with a sound pressure level of 100 dB at 520 Hz. Such a system can open up a way through the design of effective tunable sub-wavelength acoustic energy harvesters based on AM applied to scavenge energy from sound.

[1]  Yong Li,et al.  Metascreen-Based Acoustic Passive Phased Array , 2015 .

[2]  B. Djafari-Rouhani,et al.  Acoustic band structure of periodic elastic composites. , 1993, Physical review letters.

[3]  Jensen Li,et al.  Extreme acoustic metamaterial by coiling up space. , 2012, Physical review letters.

[4]  Nicholas X. Fang,et al.  Anisotropic Complementary Acoustic Metamaterial for Canceling out Aberrating Layers , 2014 .

[5]  M. Badreddine Assouar,et al.  General analytical approach for sound transmission loss analysis through a thick metamaterial plate , 2014 .

[6]  Yong Li,et al.  A sonic band gap based on the locally resonant phononic plates with stubs , 2010 .

[7]  Lifeng Wang,et al.  Multiband wave filtering and waveguiding in bio-inspired hierarchical composites , 2015 .

[8]  Wei He,et al.  Enhanced Acoustic Energy Harvesting Using Coupled Resonance Structure of Sonic Crystal and Helmholtz Resonator , 2013 .

[9]  Jihong Wen,et al.  Sound transmission loss of metamaterial-based thin plates with multiple subwavelength arrays of attached resonators , 2012 .

[10]  Bumkyoo Choi,et al.  A study on the acoustic energy harvesting with Helmholtz resonator and piezoelectric cantilevers , 2013 .

[11]  P. Sheng,et al.  Locally resonant sonic materials , 2000, Science.

[12]  P. Sheng,et al.  Acoustic metamaterials: From local resonances to broad horizons , 2016, Science Advances.

[13]  Lifeng Wang,et al.  Periodic co-continuous acoustic metamaterials with overlapping locally resonant and Bragg band gaps , 2014 .

[14]  Yan Pennec,et al.  Negative effective mass density of acoustic metamaterial plate decorated with low frequency resonant pillars , 2014 .

[15]  Chunyin Qiu,et al.  Metamaterial with simultaneously negative bulk modulus and mass density. , 2007, Physical review letters.

[16]  B. Liang,et al.  An acoustic rectifier. , 2010, Nature materials.

[17]  A. Alú,et al.  Controlling sound with acoustic metamaterials , 2016 .

[18]  Mihail M. Sigalas,et al.  Defect states of acoustic waves in a two-dimensional lattice of solid cylinders , 1998 .

[19]  Yong Li,et al.  Experimental realization of full control of reflected waves with subwavelength acoustic metasurfaces , 2014, 1407.1138.

[20]  Toshikazu Nishida,et al.  A MEMS acoustic energy harvester , 2006 .

[21]  Bin Li,et al.  Harvesting low-frequency acoustic energy using quarter-wavelength straight-tube acoustic resonator , 2013 .

[22]  Badreddine Assouar,et al.  Acoustic metamaterials for sound mitigation , 2016 .

[23]  B. Djafari-Rouhani,et al.  Optomechanical interactions in two-dimensional Si and GaAs phoXonic cavities , 2014, Journal of physics. Condensed matter : an Institute of Physics journal.

[24]  Lien-Wen Chen,et al.  Acoustic energy harvesting using resonant cavity of a sonic crystal , 2009 .

[25]  Yong Li,et al.  Acoustic energy harvesting based on a planar acoustic metamaterial , 2016 .

[26]  S. Cummer,et al.  Broadband Acoustic Hyperbolic Metamaterial. , 2015, Physical review letters.

[27]  P. Sheng,et al.  Membrane-type acoustic metamaterial with negative dynamic mass. , 2008, Physical review letters.

[28]  Bin Liang,et al.  Acoustic diode: rectification of acoustic energy flux in one-dimensional systems. , 2009, Physical review letters.

[29]  P. Sheng,et al.  Dark acoustic metamaterials as super absorbers for low-frequency sound , 2012, Nature Communications.

[30]  P. Sheng,et al.  Acoustic metasurface with hybrid resonances. , 2014, Nature materials.

[31]  N. Fang,et al.  Ultrasonic metamaterials with negative modulus , 2006, Nature materials.

[32]  Massimo Ruzzene,et al.  Broadband plate-type acoustic metamaterial for low-frequency sound attenuation , 2012 .

[33]  Bin Liang,et al.  Reflected wavefront manipulation based on ultrathin planar acoustic metasurfaces , 2013, Scientific Reports.

[34]  Eleftherios N. Economou,et al.  Band structure of elastic waves in two dimensional systems , 1993 .

[35]  Ping Sheng,et al.  Measurements of sound transmission through panels of locally resonant materials between impedance tubes , 2005 .