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The Minnaert resonance is a phenomenon associated with a gas bubble pulsating at its natural frequency in a liquid, neglecting the effects of surface tension and viscous attenuation. It is the frequency of the sound made by a drop of water from a tap falling in water underneath, trapping a bubble of air as it falls. The natural frequency of the entrapped air bubble in the water is given by and being respectively the density and the speed of sound in the bubble.

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  • Resonancia de Minnaert (es)
  • Minnaert resonance (en)
  • Minnaertresonantie (nl)
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  • La resonancia de Minnaert​ es una frecuencia de resonancia acústica producida por una única burbuja en un dominio infinito de agua (sin contar con los efectos de la tensión superficial ni la atenuación de viscosidad). Debe su nombre al astrónomo belga Marcel Minnaert. (es)
  • Minnaertresonantie is de trilling van een luchtbelletje in water bij een karakteristieke geluidsfrequentie, als de oppervlaktespanning en de demping door de viscositeit van het water worden verwaarloosd. Als een waterdruppel in water valt, ontstaat een luchtbel van de meegesleepte lucht in het water. Een trilling van die luchtbel geeft het vertrouwde heldere geluid, nog voor de luchtbel in het water barst. Marcel Minnaert beschreef dit verschijnsel ook in Natuurkunde van 't vrije veld deel 2. (nl)
  • The Minnaert resonance is a phenomenon associated with a gas bubble pulsating at its natural frequency in a liquid, neglecting the effects of surface tension and viscous attenuation. It is the frequency of the sound made by a drop of water from a tap falling in water underneath, trapping a bubble of air as it falls. The natural frequency of the entrapped air bubble in the water is given by and being respectively the density and the speed of sound in the bubble. (en)
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  • La resonancia de Minnaert​ es una frecuencia de resonancia acústica producida por una única burbuja en un dominio infinito de agua (sin contar con los efectos de la tensión superficial ni la atenuación de viscosidad). Debe su nombre al astrónomo belga Marcel Minnaert. (es)
  • The Minnaert resonance is a phenomenon associated with a gas bubble pulsating at its natural frequency in a liquid, neglecting the effects of surface tension and viscous attenuation. It is the frequency of the sound made by a drop of water from a tap falling in water underneath, trapping a bubble of air as it falls. The natural frequency of the entrapped air bubble in the water is given by where is the radius of the bubble, is the polytropic coefficient, is the ambient pressure, and is the density of water. This formula can also be used to find the natural frequency of a bubble cloud with as the radius of the cloud and the difference between the density of water and the bulk density of the cloud. For a single bubble in water at standard pressure , this equation reduces to, where is the natural frequency of the bubble. The Minnaert formula assumes an ideal gas, however it can be easily modified to account for deviations from real gas behavior by accounting for the gas compressibility factor, or the gas bulk modulus and being respectively the density and the speed of sound in the bubble. (en)
  • Minnaertresonantie is de trilling van een luchtbelletje in water bij een karakteristieke geluidsfrequentie, als de oppervlaktespanning en de demping door de viscositeit van het water worden verwaarloosd. Als een waterdruppel in water valt, ontstaat een luchtbel van de meegesleepte lucht in het water. Een trilling van die luchtbel geeft het vertrouwde heldere geluid, nog voor de luchtbel in het water barst. Marcel Minnaert beschreef dit verschijnsel ook in Natuurkunde van 't vrije veld deel 2. (nl)
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