What kind of frequencies do low-pass filters allow to pass?

Low-pass filters are designed to allow signals with frequencies lower than a specified cutoff frequency to pass while attenuating signals with frequencies higher than that cutoff. This characteristic is critical in various applications, such as audio processing, where you might want to eliminate high-frequency noise while preserving the bass signals.

By allowing only low frequencies to pass, these filters help to ensure that the output contains primarily the desired low-frequency components, improving clarity in sound systems and other electronic circuits. Low-pass filters have a frequency response that decreases as the frequency increases, which effectively blocks higher frequency signals, making it essential in filtering applications where high-frequency interference is a concern.

Understanding this functionality is pivotal for an aircraft electronics technician, as many aircraft systems rely on precise frequency control for proper operation, ensuring that signal integrity is maintained in critical systems.