Composition for acoustic damping
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United States of America Patent
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Jul 3, 2012
Grant Date -
Feb 26, 2009
app pub date -
Aug 7, 2008
filing date -
Aug 17, 2007
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In one embodiment of the invention, a composition for a damping wedge in an ultrasonic probe having a wedge body is disclosed, the composition including: 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 the 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.
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