High-pass filtering is a signal processing technique that allows high-frequency signals to pass through while attenuating (reducing) the amplitude of lower-frequency signals. This method is commonly used in audio processing to remove unwanted low-frequency noise, such as rumble or hum, from recordings. By focusing on higher frequencies, high-pass filters help enhance clarity and detail in sound. In image processing, high-pass filtering sharpens images by emphasizing edges and fine details. It works by subtracting a low-frequency version of the image from the original, leaving behind the high-frequency components. This technique is useful in applications like photography and computer vision, where clear and defined edges are essential for analysis and presentation.