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Suppression of short-range exposure to infectious aerosols using multiple paths of midair ultrasound acoustic streaming

Nagata, Kouta ; Hasegawa, Keisuke

Taylor & Francis 2024

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  • Título:
    Suppression of short-range exposure to infectious aerosols using multiple paths of midair ultrasound acoustic streaming
  • Autor: Nagata, Kouta ; Hasegawa, Keisuke
  • Assuntos: Biotechnology ; FOS: Biological sciences ; FOS: Health sciences ; Infectious Diseases ; Microbiology ; Neuroscience ; Space Science
  • Notas: 10.1080/02786826.2024.2345156
    RelationTypeNote: IsSupplementTo -- 10.1080/02786826.2024.2345156
  • Descrição: One of the major infectious routes of respiratory diseases, such as COVID-19, is exposure to viral aerosols transmitted from an infected person over a short distance. Conventionally, plastic shields or personalized ventilation methods utilizing fans or jets to generate airflows between two facing users have been used to combat such short-range infection. Nevertheless, these methods entail several drawbacks: bulky apparatus hindering users’ cooperative activities must be placed between them, the shields need frequent cleaning and block conversation voices, and the jet- or fan-based methods yield uncomfortably strong airflows hitting the user’s face. Here, a new airflow-based strategy for suppressing aerosol exposure, which overcomes all the above inconveniences, was proposed. In this strategy, ultrasound-driven localized airflows called acoustic streaming, whose positions and traveling directions can be electronically controlled, was used. A prototype system composed of a group of phased arrays of airborne ultrasound transducers was created, and they were set behind the users to redirect paths of aerosols emitted from the user’s mouth toward their upper and back sides. It is experimentally confirmed that the proposed system could reduce exposure to aerosols whose diameters are the same as ones emitted from people by 89.95% under a certain setup. By controlling the position and direction of the streaming, the proposed method can maintain its performance when users move their heads or bodies. The proposed system can virtually produce or delete programmable partitions in the air as desired, and can be integrated with other conventional methods for infection control.
  • Editor: Taylor & Francis
  • Data de criação/publicação: 2024
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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