impedance
IPA: ɪmpˈidʌns
noun
- The act of impeding; that which impedes; a hindrance.
- (physics) A measure of the opposition to the flow of an alternating current in a circuit; the aggregation of its resistance, and inductive and capacitive reactances; the ratio of voltage to current treated as complex quantities.
- (physics) A quantity analogous to electrical impedance in some other energy domain
- (physics, usually with “mechanical”) a measure of opposition to motion of something subjected to a force; the ratio of force to velocity treated as complex quantities.
- (physics, usually with “acoustic” or “sound”) the ratio of sound pressure to volume flow rate treated as complex quantities.
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Examples of "impedance" in Sentences
- The impedance of a loudspeaker is partly resistive.
- The SI unit of characteristic impedance is the ohm.
- Yes, the difference in impedance would be fairly large.
- The impedance in one circuit is transformed by the square of the turns ratio.
- The phrase impedance matching seems to have moved towards mainstream language in recent times:
- Furthermore expertise in a number of relative applied techniques, such as impedance spectroscopy will also be vital.
- The term impedance is most often encountered in dealing with antennas and speakers in television, stereo, and radio systems.
- The issue with the Thiels is they have low sensitivity (84dB, I believe for the 3.6) and impedance, which is rated at 4 ohm but may actually be as low as 3.
- The music reference hit home as well, as I often experienced this kind of impedance mismatch with the drummer from my old band - he's an inexhaustible fountain of music minutiae.
- When effective resistances and reactances are connected together, either in series or parallel or series-parallel, then the equivalent resistance of the overall circuit is called impedance Z.
- One of the problems the middle ear has to overcome is the mismatch in impedance between air and the cochlea, but impedance matching by the middle ear results in only a 30 dB increase in sound energy transmitted to the inner ear.
- Guts: One of the problems the middle ear has to overcome is the mismatch in impedance between air and the cochlea, but impedance matching by the middle ear results in only a 30 dB increase in sound energy transmitted to the inner ear.