Low-pass filtering is a technique used in signal processing to allow low-frequency signals to pass through while attenuating (reducing) the strength of higher-frequency signals. This is useful in various applications, such as audio processing, where it helps to remove unwanted noise or high-frequency sounds, resulting in a clearer output. In electronics, a low-pass filter can be implemented using components like resistors and capacitors. The cutoff frequency determines which signals are allowed to pass; frequencies below this threshold are transmitted, while those above are diminished. This filtering process is essential in improving the quality of signals in communication systems and audio equipment.