Minnaert resonance

The Minnaert resonance is the acoustic resonance frequency of a single bubble in an infinite domain of water (neglecting the effects of surface tension and viscous attenuation). The resonant frequency is given by where a is the radius of the bubble, γ is the polytropic coefficient, pA is the ambient pressure, and ρ is the density of water. This formula can also be used to find the resonant frequency of a bubble cloud with a as the radius of the c... more

The Minnaert resonance is the acoustic resonance frequency of a single bubble in an infinite domain of water (neglecting the effects of surface tension and viscous attenuation). The resonant frequency is given by where a is the radius of the bubble, γ is the polytropic coefficient, pA is the ambient pressure, and ρ is the density of water. This formula can also be used to find the resonant frequency of a bubble cloud with a as the radius of the cloud and ρ the effective density of the cloud. For a bubble in water at standard pressure, this equation reduces to , where ω = 2πf is the angular frequency. less