Meaning & use
LPF
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Meaning
abbreviationcountabletechnical
Short for low-pass filter: a circuit or program that lets low frequencies pass while reducing higher ones.
Grammar: Used as a noun with an or the: add an LPF to the signal path.
Patterns
- an LPF on something
- LPF at some frequency
The engineer put an LPF on the signal to remove high-pitched hiss.
Set the LPF to cut off at 5 kilohertz.
A simple LPF made of a resistor and a capacitor smooths the output.
Word forms
| plural | LPFs |
|---|
Common combinations
- apply an LPF
- Apply an LPF before sampling the signal.
- LPF cutoff
- The LPF cutoff is set at two kilohertz.
- analog LPF
- An analog LPF protects the converter from noise.
- engage the LPF
- Engage the LPF to take the sharpness out of the sound.
Synonyms and how they differ
- low-pass filter
- Low-pass filter is the full term, while LPF is the shorthand used on diagrams and equipment.
- high-cut filter
- High-cut filter is another name for the same effect, mainly in audio mixing.
- treble cut
- Treble cut is the informal audio description of what an LPF does to sound.
Opposites
Word family
- HPF abbreviation
- high-pass filter, the opposite type
- filter noun
- a device that removes part of a signal
- cutoff frequency noun
- the point where filtering begins
Commonly confused: LPF or HPF?
LPF vs HPF
An HPF passes high frequencies and removes low ones, the reverse of an LPF.
Practice
Which device would you use to remove high-pitched hiss from a recording?
Choose one answer.
An LPF, or low-pass filter, reduces high frequencies. An HPF would do the opposite, and the other items do not filter sound.
Make it your own
Write a sentence using “LPF”, then check it and compare it with the examples above.