Which filter is designed to pass high frequencies while attenuating low frequencies?

A high-pass filter is specifically designed to allow high frequencies to pass through while significantly reducing the amplitude of lower frequencies. This characteristic makes it essential in applications where clarity and precision of high-frequency signals are necessary, such as in audio processing and telecommunications.

The functionality of a high-pass filter is rooted in its design, which typically involves capacitive and resistive elements that block lower frequency signals. When a signal with a mix of frequencies is applied to a high-pass filter, the high frequencies can exit the filter with minimal attenuation, while the lower frequencies are diminished in strength. This behavior is crucial in various technical applications, including eliminating low-frequency noise from audio signals or improving signal integrity in communication systems.

In contrast, other filters mentioned, such as a low-pass filter, allow low frequencies to pass and block high frequencies. A band-pass filter allows a specific range of frequencies and attenuates both lower and higher frequencies outside of that band. A band-reject filter, on the other hand, attenuates a range of frequencies while allowing frequencies outside of that range to pass. Following this understanding of how high-pass filters operate helps in grasping their significance in electronic systems and signal processing.