Attenuation

Attenuation: The frictional part of reduced energy or lost power due to smoothing or filtering.

Attenuation: The loss in power of electromagnetic signals between transmission and reception points.
At-the-Money: An option whose strike price is closest to the current price of the underlying deliverable.

Bandpass Filter: Filter with a single transmission band or passband with relatively low attenuation extending from a lower band-edge frequency greater than zero to a finite upper band- edge frequency.

Because these waves are not guided but diverge, in free space these systems have attenuation which is inversely proportional to distance squared.

At-the-Money
An option whose strike price is nearest the current price of the underlying deliverable
.
Attenuation
The fractional part of reduced energy or lost power due to smoothing or filtering.

See also: Future, Option, Extreme, Transfer, Period