Method of estimation of frequency spectrum and power of the sound generated by an unsteady flow through a sonic crystal

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F19%3A00332640" target="_blank" >RIV/68407700:21230/19:00332640 - isvavai.cz</a>
Result on the web
<a href="http://pub.dega-akustik.de/ICA2019/data/articles/000655.pdf" target="_blank" >http://pub.dega-akustik.de/ICA2019/data/articles/000655.pdf</a>
DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Method of estimation of frequency spectrum and power of the sound generated by an unsteady flow through a sonic crystal
Original language description
Although the importance of sonic crystals serving as sound barriers is growing, only a little interest was given to the sound emission from a sonic crystal due to windy weather conditions. The Curle’s aeroacoustic analogy is reviewed in brief to obtain a suitable formulation for the low Mach number flow and rigid crystal structure. The radiation from the crystal has the dipolar characteristic and the dominating frequency corresponds to the Strouhal number 0.3. The values slightly exceeding 50 dB[A] were found for the radiation maxima at 20 m distance. It follows from the method design that it provides maximum estimate of the radiated power.
Czech name
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Czech description
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Project
<a href="/en/project/GA18-24954S" target="_blank" >GA18-24954S: Propagation of acoustic waves through phononic materials and structures</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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