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| im·pe·dance [ im pd'nss ] |
noun |
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1. prevention of progress: something that delays or prevents progress, or the preventing of progress
(
formal
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2. electricity opposition to flow of alternating current: the opposition in an electrical circuit to the flow of alternating current, consisting of resistance and reactance.
Symbol Z
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3. acoustics ratio of sound pressure to velocity: the ratio of the sound pressure in a medium to the velocity of the particles in the medium.
See also immittance
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