Sonic Crystal as a Potential Source of Low-Frequency Noise
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F18%3A00321496" target="_blank" >RIV/68407700:21230/18:00321496 - isvavai.cz</a>
Result on the web
<a href="http://radio.feld.cvut.cz/conf/poster/" target="_blank" >http://radio.feld.cvut.cz/conf/poster/</a>
DOI - Digital Object Identifier
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Alternative languages
Result language
čeština
Original language name
Sonic Crystal as a Potential Source of Low-Frequency Noise
Original language description
Sonic crystals are promising installations in the field of noise reduction. This paper investigates the possibility that the low Mach number airflow through an array of rods forming the crystal may act as an unwanted sound source. The problem is approached by numerical simulations of the turbulent airflow and the numerical data are further treated by Curle’s aeroacoustic analogy. The results show that the crystal is capable of emitting the low-frequency sound with the fundamental frequency corresponding to the characteristic time of hydrodynamic instabilities given by the Strouhal law. Sensation of the noise is briefly discussed.
Czech name
Sonic Crystal as a Potential Source of Low-Frequency Noise
Czech description
Sonic crystals are promising installations in the field of noise reduction. This paper investigates the possibility that the low Mach number airflow through an array of rods forming the crystal may act as an unwanted sound source. The problem is approached by numerical simulations of the turbulent airflow and the numerical data are further treated by Curle’s aeroacoustic analogy. The results show that the crystal is capable of emitting the low-frequency sound with the fundamental frequency corresponding to the characteristic time of hydrodynamic instabilities given by the Strouhal law. Sensation of the noise is briefly discussed.
Classification
Type
O - Miscellaneous
CEP classification
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OECD FORD branch
10307 - Acoustics
Result continuities
Project
<a href="/en/project/GA18-24954S" target="_blank" >GA18-24954S: Propagation of acoustic waves through phononic materials and structures</a><br>
Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů