DOI: 10.1121/10.0046800 ISSN: 1520-8524

Generation of ring-shaped acoustic pressure fields based on the bottle beam concept using airborne ultrasonic phased arrays

Tomoharu Takaki, Gakuto Arakawa, Yasutoshi Makino, Hiroyuki Shinoda
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This paper verifies the feasibility of generating acoustic ring beams—defined as ring-shaped, high-pressure distributions localized around a target plane—using an airborne ultrasonic phased array. Physical experiments using a 40 kHz airborne ultrasonic phased array confirmed that the diameter of the proposed acoustic ring beam is much larger than the wavelength. The proposed method is expected to open up possibilities for applications, such as the acoustic cloaking of large objects.

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