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مجله علمی پژوهشی انجمن مهندسی صوتیات ایران 2017, 4(2): 0-0 Back to browse issues page
Calculating Band structure, absorption and transmission coefficient of one- and two-dimensional phononic crystals
H. Salehi * , M. Aryadost
Abstract:   (270 Views)

In this paper, we have investigated the propagation of sound waves into one- and two- dimensional  phononic crystals. The phonon crystals constituted of square rows consist of metal filled cylinders in epoxy and air background. The metals are of the third group of periodic table, for instance Aluminum and Nickel. Frist, we calculated the band structure by using the plane wave expansion method (PWE). Then, we determined the absorption and transmission coefficient, and Pressure distribution. The crystal sizes of the crystals are directly proportional to the wave length, therefore making it possible to create crystals which vary from macro‌meters to nanometers and with frequencies which vary from Hz to THz. The results of the numerical simulation for absorption and transmission coefficient and pressure distribution for five metals are presented.

Keywords: Phononic crystals, Phononic band structure, Absorption coefficient, Transmission coefficient, Plane wave expansion method.
Full-Text [PDF 32 kb]   (21 Downloads)    
Type of Study: Research | Subject: Hydroacoustics
Received: 2015/12/18 | Accepted: 2017/04/30 | Published: 2018/06/27
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Salehi H, Aryadost M. Calculating Band structure, absorption and transmission coefficient of one- and two-dimensional phononic crystals. مجله علمی پژوهشی انجمن مهندسی صوتیات ایران. 2017; 4 (2)
URL: http://joasi.ir/article-1-83-en.html


year 4, Issue 2 (Journal of Acoustical Engineering Society of Iran 2017) Back to browse issues page
مجله علمی-پژوهشی انجمن lمهندسی صوتیات ایران Journal of Acoustical Engineering Society of Iran
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