narrow-band frequency modulation

narrow-band frequency modulation

[′nar·ō ¦band ′frē·kwən·sē ‚mäj·ə′lā·shən]
(communications)
Frequency-modulated broadcasting system used primarily for two-way voice communication, typically having a maximum deviation of 15 kilohertz or less.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.