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LF(1) See line feed.
(2) (Low Frequency) A range of radio frequencies from 30 to 300,000 Hz. The LF band is used for atomic clock time signals, amateur radio in various parts of the world, submarine communications, ground-based navigation and other radio-based systems.
With regard to audio, low-frequency waves are typically under 800 Hz. See frequency bands, high frequency, VHF, UHF and spectrum.
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low frequency (LF)
Frequencies lying between 30 and 300 kHz. These, along with medium frequencies, are used mainly for nondirectional beacons (NDB). The aeronautical allocation for NDBs covers part of both bands from 200 to 420 kHz.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved