A High Pass Filter is an electronic circuit or algorithm that allows signals with a frequency higher than a certain cutoff frequency to pass through while attenuating (reducing) signals with lower frequencies. This is useful in various applications, such as audio processing, where it can help eliminate unwanted low-frequency noise, like rumble or hum. In the context of signal processing, a high pass filter can be implemented using different methods, including RC circuits or digital filtering techniques. By adjusting the cutoff frequency, users can tailor the filter's response to suit specific needs, enhancing the clarity of desired signals while minimizing interference from lower frequencies.