impedance

n. the total resistance that a circuit gives to an alternating current.

n. the total effective resistance of an electric circuit or component to alternating current, arising from the combined effects of ohmic resistance and reactance.

“The speakers have an impedance of eight ohms, so they work well with this amplifier.”

“Matching the output impedance of the amplifier to the input impedance of the loudspeakers is critical for efficient power transfer and signal integrity.”

Technical

n. the way a material or system resists the flow of energy, like sound waves.

n. a measure of the opposition that a system presents to the flow of energy from a source, such as acoustic or mechanical waves.

“The doctor checked the impedance of the patient's ear to see if there was fluid inside.”

“Acoustic impedance is a fundamental property that determines how much sound energy is reflected or transmitted at the boundary between two different media.”

Technical

n. something that stops or slows down progress.

n. the act of impeding or a physical or metaphorical hindrance that obstructs progress.

“The lack of funding was a major impedance to the research project.”

“Bureaucratic impedance often prevents small businesses from accessing the grants they need to scale their operations effectively.”

Formal