the ratio of sound pressure to volume flow rate treated as complex quantities.
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.
The act of impeding; that which impedes; a hindrance.
a measure of opposition to motion of something subjected to a force; the ratio of force to velocity treated as complex quantities.