This paper is concerned with a theoretical model of the head. Neuroanatomical and analytical considerations lead to a fluid-filled spherical shell as a first-generation model. The shell is considered thin, elastic, homogeneous, and isotropic. The shell equations includeboth membrane and bending effects in axisymmetric torsionless motion. The motion of the fluid is governed by the wave equation....

Rats are potentially very useful for auditory research because the middle ear structures are easily approachable and because rats are relatively inexpensive. The goal of the present study was to better characterize the mechanics of the rat middle ear by measuring frequency responses at multiple points on the tympanic membrane and manubrium. A laser Doppler vibrometer was used to measure the vib...

Propagating modes of vibration of a bilipid membrane have been detected with light beating spectroscopy. The dependence of omega on q is consistent with a model of a fluid film of surface tension sigma = 2.5 +/- 0.5 dyn cm-1 surrounded by a medium with rho = 1 g cm-3 and eta = 1.01 X 10(-2) P.

OBJECTIVE To determine the feasibility of measuring tympanic membrane (TM) vibrations at multiple locations on the TM to differentiate normal eardrums from those with associated ossicular pathologies. DESIGN Cadaveric human temporal bone study. SETTING Basic science laboratory. METHODS A mastoidectomy and facial recess approach was performed on four cadaveric temporal bones to obtain acce...

Optical membranes are being pursued for their ability to replace the conventional mirrors that are used to correct wave front aberration and space based telescopes. Among some of the many benefits of using optical membranes, is their ability to considerably reduce the weight of the structure. As a secondary effect, the cost of transportation, which is of great interest in space applications, is...

In this paper we investigate the capability of harvesting the electric energy from mechanical vibrations in a dynamic environment through a unimorph piezoelectric membrane transducer. Due to the impedance matrices connecting the efforts and flows of the membrane, we have established the dynamic electric equivalent circuit of the transducer. In a first study and in order to validate theoretical ...

Functionalized membranes have high potential value in a broad range of practical applications, and the functional groups at membrane edge play vital role permeability membranes. Here, based on an edge-functionalized graphene oxide (GO) model, we theoretically report that high-frequency terahertz stimulation frequency near 44.0 THz can significantly enhance water by nearly five times. Its mechan...

This paper deals with the problem of active vibration control for a flexible axisymmetric membrane. mechanical system is equipped two piezoelectric circular chips where one them works as an actuator, whereas other used sensor. Both are glued on membrane, each side, and centered according to its axis symmetry. The model this obtained from finite element modelling, leading linear state-space mode...

This paper investigated the vibration of a printed electronic laminated membrane subjected to pretension and air resistance in thermal environments. First, mathematical model for moving is established, which considers inhomogeneity tension at both ends membrane. The equilibrium governing differential equation obtained according classical laminate plate theory Hamilton’s principle. quadrature me...