A high-pass filter is an electronic circuit that allows signals with a frequency higher than a certain cutoff frequency to pass through while attenuating signals with lower frequencies. This type of filter is commonly used in audio processing, telecommunications, and signal processing to remove unwanted low-frequency noise or interference. High-pass filters can be implemented using various components, such as resistors, capacitors, and operational amplifiers. They are essential in applications like audio equalizers, where they help enhance sound quality by filtering out low-frequency hums or rumbles, ensuring that only the desired higher frequencies are amplified.