Visualization of the hot chocolate sound effect by spectrograms

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F12%3A00379958" target="_blank" >RIV/61388998:_____/12:00379958 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.jsv.2012.07.038" target="_blank" >http://dx.doi.org/10.1016/j.jsv.2012.07.038</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jsv.2012.07.038" target="_blank" >10.1016/j.jsv.2012.07.038</a>

Result language
angličtina
Original language name
Visualization of the hot chocolate sound effect by spectrograms
Original language description
We present an experimental and theoretical analysis of the hot chocolate effect. The sound effect is evaluated using time-frequency signal processing, resulting in a quantitative visualization by spectrograms. This method allows us to capture the whole phenomenon, namely, to quantify the dynamics of the rising pitch. A general form of the time dependence volume fraction of the bubbles is proposed. We show that the effect occurs due to the nonlinear dependence of the speed of sound in the gas/liquid mixture on the volume fraction of the bubbles and the nonlinear time dependence of the volume fraction of the bubbles.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BK - Liquid mechanics
OECD FORD branch
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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