impedance

IPA: ɪmpˈidʌns

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.

Examples of "impedance" in Sentences

Yes, the difference in impedance would be fairly large.
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.