定量实时动态反应和损伤机制的人类小膜暴露在爆炸波的量化
Jonathan Oliveira Luiz1, Anahita Alipanahi1, John J Rosowski2
1Center for Holographic Studies and Laser Micro-mechaTronics (CHSLT), Worcester Polytechnic Institute (WPI), 100 Institute Road, Worcester, MA 01609.
概括
这项研究揭示了 tympanic 膜 (TM) 如何使用先进的成像对爆炸波做出反应. 了解TM生物力学是防止爆炸导致听力损失的关键.
科学领域:
- 生物力学 生物力学
- 听力损伤研究 听力损伤研究
- 声学 声学 在声学上
背景情况:
- 爆炸引起的听力损伤是一个重大问题.
- 目前测量 tympanic 膜 (TM) 对爆炸的动态反应的方法是有限的.
- 了解极端声学条件下的TM行为对于开发保护策略至关重要.
研究的目的:
- 为了研究人类耳膜 (TMs) 对爆炸超压的动态反应.
- 量化冲击波和TM之间的相互作用.
- 评估TM行为,特别是它是否在高强度声学事件下表现为薄外.
主要方法:
- 使用了一种新的系统,将高速定量成像 (3D-DIC,Schlieren) 与定制冲击管 (ST) 集成在一起.
- 同步高速成像与高频压力传感器捕获冲击波 (SW) 生成,传播和TM相互作用.
- 采用数字显微镜和光学连贯性断层扫描 (OCT) 进行前后TM形态特征化.
主要成果:
- 呈现了人体尸体的全场,高速的动态反应,对不同爆炸超压的动态反应.
- 量化了TM和冲击波之间的液体-固体相互作用.
- 记录了实时的TM断裂,提供了对损伤机制的见解.
结论:
- 这项研究增强了对TM生物力学和爆炸条件下的损伤力学的理解.
- 这些发现有助于改善爆炸引起的听力损伤的预防和治疗策略.
- 这项研究提供了关于TM对高强度声学事件的反应的关键数据.
相关概念视频
01:16Dynamic Modulus of Elasticity of Concrete
286
The dynamic modulus of elasticity assesses how a concrete structure deforms under impact or dynamic loads. It is typically higher than the static modulus of elasticity, measured under slow, steady loading conditions.
The sonic test is a common method to determine the dynamic modulus. In this test, a concrete beam, sized either 6 x 6 x 30 inches or 4 x 4 x 20 inches, is clamped at its center. Vibrations are initiated at one end of the beam by an electromagnetic exciter unit powered by...
The sonic test is a common method to determine the dynamic modulus. In this test, a concrete beam, sized either 6 x 6 x 30 inches or 4 x 4 x 20 inches, is clamped at its center. Vibrations are initiated at one end of the beam by an electromagnetic exciter unit powered by...
286
00:53Sound Intensity Level
4.2K
Humans perceive sound by hearing. The human ear helps sound waves reach the brain, which then interprets the waves and creates the perception of hearing. The loudness of the environment in which a person is located determines whether they can distinguish between different sound sources.
The human ear can perceive an extensive range of sound intensity, necessitating the use of the logarithmic scale to define a physical quantity—the intensity level. It is a ratio of two intensities and...
The human ear can perceive an extensive range of sound intensity, necessitating the use of the logarithmic scale to define a physical quantity—the intensity level. It is a ratio of two intensities and...
4.2K