Abstract
An intense aerial ultrasonic source containing a compact circular vibrating plate with a uniform rod-type partially grooved source that can produce large displacement in part of the piston vibration and emit intense sound waves in a direction perpendicular to the vibration surface is investigated. Two different compact circular vibrating plates of intense aerial ultrasonic sources (square grooves and round grooves) are designed by considering the stress generated in ultrasonic sources and the sound pressure of the radiated sound waves. The vibration displacement distribution, the directivity of the emitted sound waves, and the input/output characteristics in designed ultrasonic sources are discussed. It was found that the sound waves can be emitted farther away perpendicular to the vibration surface at a very high sound pressure compared with traditional sources.
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