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Updated: Jun 18, 2026

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使用气体囊泡进行超高频超声波的压力估计

Eric M Strohm1,2,3, Di Wu4, Dina Malounda4

  • 1Department of Physics, Toronto Metropolitan University (formerly Ryerson University), Toronto, Ontario M5B 2K3, Canada.

The Journal of the Acoustical Society of America
|December 23, 2024
PubMed
概括

这项研究引入了一种使用气囊纳米结构 (GVs) 的新方法,以准确测量超高频超声传感器的输出压力. 该技术量化了传感器压力,这对于高分辨率声学显微镜应用至关重要.

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相关概念视频

Excess Pressure Inside a Drop and a Bubble01:13

Excess Pressure Inside a Drop and a Bubble

The shape of a small drop of liquid can be considered spherical, neglecting the effect of gravity. This drop can further be considered as two equal hemispherical drops put together due to surface tension. The forces acting on the spherical drop are due to the pressure of the liquid inside the drop, the pressure due to air outside the drop, and the force due to the surface tension acting on the two hemispherical drops.
Sound as Pressure Waves01:17

Sound as Pressure Waves

Sound waves, which are longitudinal waves, can be modeled as the displacement amplitude varying as a function of the spatial and temporal coordinates. As a column of the medium is displaced, its successive columns are also displaced. As the successive displacements differ relatively, a pressure difference with the surrounding pressure is created. The gauge pressure varies across the medium.
The pressure fluctuation depends on the difference in displacements between the successive points in the...