A low-pass filter is an electronic circuit that allows signals with frequencies below a certain cutoff frequency to pass through while attenuating signals with frequencies above that threshold. This functionality is essential in various applications, such as audio processing, where it can be used to reduce high-pitched noise, and in signal processing, where it helps in smoothing data by removing rapid fluctuations.
In audio applications, a low-pass filter is often referred to as a high-cut filter. It passes frequencies below its cutoff frequency and attenuates frequencies above it, making it useful for reducing high-pitched noise.
In electronics, low-pass filters are commonly implemented using passive components like resistors and capacitors (RC filters) or inductors and resistors (RL filters). These filters are designed to modify, reshape, or reject unwanted high frequencies of an electrical signal, allowing only the desired low-frequency signals to pass through.
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