Cargando…
Airborne ultrasound pulse amplification based on acoustic resonance switching
Airborne ultrasound radiation pressure, a nonlinear effect that appears as a static force in mid-air in the presence of strong ultrasound, has recently been applied in novel scientific and industrial fields. However, the output power of an ultrasound transducer remains low mainly due to the signific...
Autores principales: | , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2022
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9630294/ https://www.ncbi.nlm.nih.gov/pubmed/36323861 http://dx.doi.org/10.1038/s41598-022-23277-8 |
_version_ | 1784823570227003392 |
---|---|
author | Hashimoto, Yuki Monnai, Yasuaki |
author_facet | Hashimoto, Yuki Monnai, Yasuaki |
author_sort | Hashimoto, Yuki |
collection | PubMed |
description | Airborne ultrasound radiation pressure, a nonlinear effect that appears as a static force in mid-air in the presence of strong ultrasound, has recently been applied in novel scientific and industrial fields. However, the output power of an ultrasound transducer remains low mainly due to the significant mismatch in acoustic impedance between a solid diaphragm and air. To circumvent this fundamental challenge, we propose to emit amplified airborne ultrasound pulses by instantaneously releasing stored acoustic energy into free-space. Specifically, we implement an acoustic cavity with a mechanically rotating shutter covering its open top. Once the acoustic cavity is fully charged, the stored energy is released by opening the shutter. By developing a choke structure that reduces leakage of the stored energy, we generate ultrasound pulses with 2.5 times higher peak power than the input continuous waves at 40 kHz. This preliminary result has a great potential to generate high-power ultrasound pulses using a conventional air-coupled transducer by separating the storage and radiation process, thus circumventing the fundamental limitation brought by impedance mismatch. |
format | Online Article Text |
id | pubmed-9630294 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-96302942022-11-04 Airborne ultrasound pulse amplification based on acoustic resonance switching Hashimoto, Yuki Monnai, Yasuaki Sci Rep Article Airborne ultrasound radiation pressure, a nonlinear effect that appears as a static force in mid-air in the presence of strong ultrasound, has recently been applied in novel scientific and industrial fields. However, the output power of an ultrasound transducer remains low mainly due to the significant mismatch in acoustic impedance between a solid diaphragm and air. To circumvent this fundamental challenge, we propose to emit amplified airborne ultrasound pulses by instantaneously releasing stored acoustic energy into free-space. Specifically, we implement an acoustic cavity with a mechanically rotating shutter covering its open top. Once the acoustic cavity is fully charged, the stored energy is released by opening the shutter. By developing a choke structure that reduces leakage of the stored energy, we generate ultrasound pulses with 2.5 times higher peak power than the input continuous waves at 40 kHz. This preliminary result has a great potential to generate high-power ultrasound pulses using a conventional air-coupled transducer by separating the storage and radiation process, thus circumventing the fundamental limitation brought by impedance mismatch. Nature Publishing Group UK 2022-11-02 /pmc/articles/PMC9630294/ /pubmed/36323861 http://dx.doi.org/10.1038/s41598-022-23277-8 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Hashimoto, Yuki Monnai, Yasuaki Airborne ultrasound pulse amplification based on acoustic resonance switching |
title | Airborne ultrasound pulse amplification based on acoustic resonance switching |
title_full | Airborne ultrasound pulse amplification based on acoustic resonance switching |
title_fullStr | Airborne ultrasound pulse amplification based on acoustic resonance switching |
title_full_unstemmed | Airborne ultrasound pulse amplification based on acoustic resonance switching |
title_short | Airborne ultrasound pulse amplification based on acoustic resonance switching |
title_sort | airborne ultrasound pulse amplification based on acoustic resonance switching |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9630294/ https://www.ncbi.nlm.nih.gov/pubmed/36323861 http://dx.doi.org/10.1038/s41598-022-23277-8 |
work_keys_str_mv | AT hashimotoyuki airborneultrasoundpulseamplificationbasedonacousticresonanceswitching AT monnaiyasuaki airborneultrasoundpulseamplificationbasedonacousticresonanceswitching |