COMPOSITION FOR ACOUSTIC DAMPING

摘要

In one embodiment of the invention, a composition for a damping wedge in a n ultrasonic probe having a wedge body is disclosed, the composition comprisin g: a viscoelastic material having a ratio of the imaginary part to the real part of the modulus of elasticity of at least about 5% and an acoustic impedance less than that of the wedge body; a filament-shaped filler in an effective amount to provide good dispersability in the viscoelastic material and to substantially match the acoustic impedance of t he damping wedge to the wedge body; and a viscosity enhancer in an effective amount to increase the viscosity of the composition to maintain a homogenous distribution of the filament--shaped filler by preventing the filament-shaped filler from settling.