Which type of filter allows frequencies below a certain cutoff frequency to pass?

A low-pass filter is designed to allow frequencies below a specified cutoff frequency to pass while attenuating frequencies above that threshold. This type of filter is commonly used in various audio applications, signal processing, and electronic circuits to reduce high-frequency noise or to limit the frequency range of a signal. The cutoff frequency is a critical parameter in a low-pass filter, as it defines the point at which the filter begins to attenuate higher frequencies. By effectively allowing lower frequencies to transit without distortion while blocking or reducing higher frequencies, low-pass filters play a key role in shaping the output signal to meet specific application needs.