Low-frequency effects
Band-limited audio for 3–120 Hz range / From Wikipedia, the free encyclopedia
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For other uses, see LFE (disambiguation).
The low-frequency effects (LFE) channel is a band-limited audio track that is used for reproducing deep and intense low-frequency sounds in the 3–120 Hz frequency range.[1] [2] [3] [4]
This track is normally sent to a subwoofer—a loudspeaker designed to reproduce very low frequencies. LFE channels originated in Dolby Stereo 70 mm film,[1] but in the 1990s and 2000s they became common in home theater systems in order to reproduce film soundtracks found on DVDs and Blu-ray discs.