Optimization on microlattice materials for sound absorption by an integrated transfer matrix method.

Materials with well-defined microlattice structures are superlight, stable, and thus bear great potential in sound absorption. An integrated transfer matrix method (TMM) is proposed to evaluate the sound absorbing efficiency of these lattice materials, in which a massive number of micropores are densely placed. A comparison between integrated TMM and conventional TMM reveals that the proposed approach offers better predictions on sound absorption of microlattice. This approach is then employed to optimize the microlattice material to determine the best pore and porosity that lead to maximum absorbing efficiency capability and minimum required thickness to attain a target sound absorption.

[1]  Z. Tao,et al.  Prediction of Sound-Absorbing Performance of Micro-Perforated Panels Using the Transfer Matrix Method , 2005 .

[2]  D. Maa,et al.  Potential of microperforated panel absorber , 1998 .

[3]  Bruno Lombard,et al.  A time-domain numerical modeling of two-dimensional wave propagation in porous media with frequency-dependent dynamic permeability. , 2013, The Journal of the Acoustical Society of America.

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

[5]  Masataka Hakamada,et al.  High sound absorption of porous aluminum fabricated by spacer method , 2006 .

[6]  M. Biot.  Theory of Propagation of Elastic Waves in a Fluid‐Saturated Porous Solid. I. Low‐Frequency Range , 1956 .

[7]  T. Lu,et al.  Optimized acoustic properties of cellular solids , 1999 .

[8]  Dong-Kyung Lee,et al.  Estimation of the absorption performance of multiple layer perforated panel systems by transfer matrix method , 2004 .

[9]  G. Seiffert,et al.  Acoustic absorption behaviour of an open-celled aluminium foam , 2003 .

[10]  L. Valdevit,et al.  Ultralight Metallic Microlattices , 2011, Science.

[11]  Malcolm J. Crocker,et al.  Recent Trends in Porous Sound-Absorbing Materials , 2010 .

[12]  K. Kalinova,et al.  Different structures of PVA nanofibrous membrane for sound absorption application , 2012 .

[13]  M. A. B•oT,et al.  Theory of Propagation of Elastic Waves in a Fluid-Saturated Porous Solid . I . Low-Frequency Range , 2011 .

[14]  Franck Sgard,et al.  Acoustic absorption of macro-perforated porous materials , 2001 .