Simulation of Horn and Parabolic Structures for Sound Pressure Amplification
In the field of acoustic detection,it is of great significance to amplify the sound pressure.In order to amplify the sound pressure,the trumpet structure and paraboloid structure models are designed,and the sound pressure amplification models of the two structures are established by using the finite element analysis method based on COMSOL Multiphysics software.Firstly,the gain multiples of two structures on sound pressure are calculated.The simulation results show that the horn structure can amplify the sound pressure up to 20 times and the paraboloid structure can amplify the sound pressure up to 30 times.Secondly,the amplification effect of different structure sizes on sound pressure is studied.The results show that the amplification effect is the most significant when the size of trumpet-shaped structure is equivalent to the wavelength,and the amplification effect is the most significant when the opening diameter of parabolic structure is at several specific values.Finally,the amplitude of membrane vibration caused by sound wave is simulated.The results show that the horn structure increases the vibration amplitude of the diaphragm by 2.7～6 times,and the parabolic structure increases the vibration amplitude of the diaphragm by 2～3.3 times.
sound pressure amplification structurefinite element methodCOMSOLdiaphragm vibration
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