In the optical domain filters are often characterised by wavelength rather than frequency. They can also be used in conjunction with a low-pass filter to produce a bandpass filter.
High-pass filters have many uses, such as blocking DC from circuitry sensitive to non-zero average voltages or radio frequency devices. It is sometimes called a low-cut filter or bass-cut filter in the context of audio engineering. A high-pass filter is usually modeled as a linear time-invariant system. The amount of attenuation for each frequency depends on the filter design. Ideal high-pass filter frequency responseĪ high-pass filter ( HPF) is an electronic filter that passes signals with a frequency higher than a certain cutoff frequency and attenuates signals with frequencies lower than the cutoff frequency.
