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. 2024 Jul 31;15:6431. doi: 10.1038/s41467-024-50797-w

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© The Author(s) 2024

Open Access This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License, which permits any non-commercial use, sharing, 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 you modified the licensed material. You do not have permission under this licence to share adapted material derived from this article or parts of it. 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-nc-nd/4.0/.

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Fig. 5 — a Instant response of the 3D printed capacitive sensor. b Capacitance response of the sensor under periodic loading pressures of 1, 3, 5, and 10 kPa, respectively. c Working stability of the sensor tested under1000 cycles of 14 kPa pressure. The insets show the first 20 cycles and the last 20 cycles. d Real-time monitoring of human deep breath and swallow, respectively. The inset shows the pressure sensor attached to the throat. e Real-time monitoring of human pulsation. The inset shows the pressure sensor attached to the wrist. f A single pulse wave from the wrist, consisting of three characteristic peaks.