The invention as disclosed is a fiber optic interferometric directional acoustic density sensor that increases the directionality of a vector sensor that is much smaller in size than the wave length of an acoustic wave. This is accomplished through the use of second order directionality by measuring the acoustic fluctuations of fluid density at a point, wherein the acoustic density fluctuations...

In the modern world, almost all electromechanical systems use sensors to acquire pertinent information from the environment during operation or to operate more effectively. In many of these applications, there is demand for increased performance along with decreased size and cost of sensor technology. Microelectromechanical systems (MEMS) are an attractive option to fill this demand due to the ...

this paper concerns with the modeling and construction of a fifth order method for two dimensional acoustic wave equation in heterogenous media. the method is based on a standard discretization of the problem on smooth regions and a nonstandard method for nonsmooth regions.the construction of the nonstandard method is based on the special treatment of the interface using suitable jump condition...

Stonehenge is the largest and most complex ancient stone circle known to mankind. In its original form, the concentric shape of stone rings would have surrounded an individual both visually and aurally. It is an outdoor space and most archaeological evidence suggests it did not have a roof. However, its large, semi-enclosed structure, with many reflecting surfaces, would have reflected and diff...

BACKGROUND Epidermal permeability alterations induced by ablative fractional resurfacing and low-frequency ultrasound technology may offer drug delivery for the treatment of hypertrophic scars through transepidermal drug delivery (TED). This technology can improve treatment efficacy and minimize side effects. OBJECTIVE To evaluate clinical response and side effects of TED technology in hypert...

Our research efforts concentrate on focusing photon and sound into sub-wavelength scales. While we emphasize on new insights of material and device design from fundamental approaches, we also actively pursue the applications of our technology in the areas of nanofabrication, energy conversion, communication, and biomedical imaging. Acoustic metamaterials promise new applications for steering an...

Acoustic levitation is a fascinating phenomenon that has captured the attention of researchers and engineers for many years. This project aims to explore possibilities potential applications acoustic technology. Using an array or couple ultrasonic transducers, we were able create standing wave allowed us levitate small objects, such as water droplets tiny plastic beads. We investigated effects ...

BACKGROUND Extracorporeal pulse activation therapy (EPAT), also called extracorporeal acoustic wave therapy, seeks to achieve effective and long-lasting improvement of age-related connective tissue weakness in the extremities, especially in the treatment of unsightly cosmetic skin defects referred to as cellulite. OBJECTIVE The objective of this study was to stimulate metabolic activity in su...