N
n Letter symbol for the prefix nano- (10–9).
N Symbol for number of turns, or the north-seeking pole of a magnet.
NA Abbreviation for numerical aperture.
nA Letter symbol for nanoampere.
NAB Abbreviation for National Association of Broadcasters.
NAB curve Also called NAB equalization. 1. The standard playback equalization curve set by the National Association of Broadcasters. 2. In tape recording, this is used to describe anything for which standards have been established by the National Association of Broadcasters to ensure complete interchangeability from one recorder to another of the same speed.
NAB reel, NAB hub Reels and hubs used in professional recording, having a large center hole and usually an outer diameter of 10½ inches (26.7 ...
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