S. Saffar, A. Abdullah, Determination of acoustic impedances of multi matching layers for narrowband ultrasonic airborne transducers at frequencies< 2.5 MHz–Application of a genetic algorithm, Ultrasonics, 52(1) (2012) 169-185.
 S. Saffar, A. Abdullah, R. Othman, Influence of the thickness of matching layers on narrow band transmitter ultrasonic airborne transducers with frequencies< 100 kHz: Application of a genetic algorithm, Applied Acoustics, 75 (2014) 72-85.
 J.M. Kim, D.H. Kim, J. Kim, J.W. Lee, W.N. Kim, Effect of graphene on the sound damping properties of flexible polyurethane foams, Macromolecular Research, 25(2) (2017) 190-196.
 H. Bahrambeygi, A. Rabbi, K. Nasouri, A.M. Shoushtari, M.R. Babaei, Morphological and structural developments in nanoparticles polyurethane foam nanocomposite's synthesis and their effects on mechanical properties, Advances in Polymer Technology, 32(S1) (2013).
 S. Basirjafari, R. Malekfar, S. Esmaielzadeh Khadem, Low loading of carbon nanotubes to enhance acoustical properties of poly (ether) urethane foams, Journal of Applied Physics, 112(10)(2012) 104312.
 M. Broghany, S. Basirjafari, S. Saffar, Optimization of flat multi-layer sound absorber by using multiobjective genetic algorithm for applicationin anechoic chamber, Modares Mechanical Engineering, 16(2) (2016) 215-222. (in Persian)
 M. Dah-You, Theory and design of microperforated panel sound-absorbing constructions, Scientia Sinica, 18(1) (1975) 55-71.
 D.-Y. Maa, Microperforated-panel wideband absorbers, Noise Control Engineering J., 29 (1987) 77-84.
 D.-Y. Maa, Potential of microperforated panel absorber, the Journal of the Acoustical Society of America, 104(5) 1998) 2861-2866.
 X.-j. ZHANG, X.-d. ZHAO, Multilayer Micro Perforated Panel Optimization Design [J], Audio Engineering, 2 (2008) 024.
 L. Lei, W. Zuomin, J. Zaixiu, Effect of soundabsorbing material on a microperforated absorbing construction, Chinese Journal of Acoustics, 30(2)(2011) 191-202.
 D. Borelli, C. Schenone, I. Pittaluga, Analysis of sound absorption behaviour of polyester fibre material faced with perforated panels, in:Proceedings of Meetings on Acoustics ICA2013,ASA, 2013, pp. 015045.
 D. Li, D. Chang, B. Liu, J. Tian, Improving sound absorption bandwidth of micro-perforated panel by adding porous materials, in: INTERNOISE and NOISE-CON Congress and Conference Proceedings, Institute of Noise Control Engineering, 2014, pp. 1877-1882.
 Y. Qian, D. Kong, Y. Liu, S. Liu, Z. Li, D. Shao, S. Sun, Improvement of sound absorption characteristics under low frequency for microperforated panel absorbers using super-aligned carbon nanotube arrays, Applied Acoustics, 82(2014) 23-27.
 X. Zhao, X. Fan, Enhancing low frequency sound absorption of micro-perforated panel absorbers by using mechanical impedance plates, Applied Acoustics, 88 (2015) 123-128.
 S.-H. Park, Acoustic properties of microperforated panel absorbers backed by Helmholtz resonators for the mprovement of low-frequency sound absorption, Journal of Sound and Vibration, 332(20) (2013) 4895-4911.
 H. Ruiz, P. Cobo, F. Jacobsen, Optimization of multiple-layer microperforated panels by simulated annealing, Applied Acoustics, 72(10) (2011) 772-776.
 K. Sakagami, Y. Fukutani, M. Yairi, M. Morimoto, Sound absorption characteristics of a double-leaf structure with an MPP and a permeable membrane,Applied Acoustics, 76 (2014) 28-34.
 M. Delany, E. Bazley, Acoustical properties of fibrous absorbent materials, Applied acoustics, 3(2) (1970) 105-116.
 Y. Miki, Acoustical properties of porous materialsgeneralizations of empirical models, Journal of the Acoustical Society of Japan (E), 11(1) (1990) 25-28.
 N. Voronina, Acoustic properties of fibrous materials, Applied Acoustics, 42(2) (1994) 165-174.
 T. Komatsu, Improvement of the Delany-Bazley and Miki models for fibrous sound-absorbing materials, Acoustical science and technology, 29(2)(2008) 121-129.
 W. Qunli, Empirical relations between acoustical properties and flow resistivity of porous plastic open-cell foam, Applied acoustics, 25(3) (1988)141-148.
 J.F. Allard, Y. Champoux, New empirical equations for sound propagation in rigid frame fibrous materials, The Journal of the Acoustical Society of America, 91(6) (1992) 3346-3353.
 P.W. Jones, N.J. Kessissoglou, Simplification of the Delany–Bazley approach for modelling the acoustic properties of a poroelastic foam, Applied Acoustics, 88 (2015) 146-152.
 D. Oliva, V. Hongisto, Sound absorption of porous materials–Accuracy of prediction methods, Applied Acoustics, 74(12) (2013) 1473-1479.
 S. Liu, W. Chen, Y. Zhang, Design optimization of porous fibrous material for maximizing absorption of sounds under set frequency bands, Applied Acoustics, 76 (2014) 319-328.
 M. Zainulabidin, M. Rani, N. Nezere, A.M. Tobi, Optimum sound absorption by materials fraction combination, International Journal of Mechanical & Mechatronics Engineering, 14(2) (2014) 118- 121.
 V. Dabbagh, R. Keshavarz, A. Ohadi, Accurate Designing of Flat-Walled Multi-Layered Lining System Using Genetic Algorithm for Application in Anechoic Chambers, in: ASME 2012 Noise Control and Acoustics Division Conference at InterNoise 2012, American Society of Mechanical Engineers, 2012, pp. 227-235.
 Y. Wang, C. Zhang, L. Ren, M. Ichchou, M.-A. Galland, O. Bareille, Sound absorption of a new bionic multi-layer absorber, Composite Structures,108 (2014) 400-408.