Bubble dynamics in drinks
Zuzana Broučková, Zdeněk Trávnı́ček, Pavel Šafařík · EPJ Web of Conferences · 2014
This study introduces two physical effects known from beverages: the effect of sinking bubbles and the hot chocolate sound effect. The paper presents two simple „kitchen” experiments. The first and second effects are indicated by means of a flow visualization and microphone measurement, respectively. To quantify the second (acoustic) effect, sound records are analyzed using time-frequency signal processing, and the obtained power spectra and spectrograms are discussed.