Introduction: Microbubbles are widely used as contrast agent in diagnostic ultrasound. Recently they have shown good potential for applications in the therapeutic field such as drug delivery to the brain. Recent studies have shown focused ultrasound in conjunction with injected micro-bubbles could temporarily disrupt blood-brain barrier and let therapeutic agents transport into...

in recent years, need to increase the convenience of trips in railway vehicles causes that train operators and manufacturers focus on reducing the noise level which is sensed by passengers. in this paper, first the state of modeling acoustic noise in cab train is discussed and natural frequencies and acoustic mode shapes are derived and then formulation of acoustic pressure in the cab will be o...

In recent years, need to increase the convenience of trips in railway vehicles causes that train operators and manufacturers focus on reducing the noise level which is sensed by passengers. In this paper, first the state of modeling acoustic noise in cab train is discussed and natural frequencies and acoustic mode shapes are derived and then formulation of acoustic pressure in the cab will be o...

Multi-path interference due to boundary reflection in shallow water acoustic communication poses a major obstacle to reliable and high-speed underwater communication system. In this study, initially 3D variations of field data such as sound speed, temperature and salinity in horizontal transects of the Strait of Hormuz were analyzed using the ROPME data. Later, data on typical sound speed ...

Abstract In order to meet the capability requirements of submarine radiated noise acoustic field prediction in free and improve detection anti-detection capabilities, this paper proposes an method based on geometric average theory field. According measured self-noise information, a global search is used. By calculating energy spherical, extended compensation for different point distances achiev...

Prediction of radiated sound from vibrating structures is required for structural design optimization and effective noise control. Techniques to predict the surface contributions to the radiated sound from a vibrating structure include the supersonic acoustic intensity, the surface contribution method and near-field acoustic holography. Near-field acoustic holography is an experimental methodol...