What type of filter allows only low frequencies to pass?

A low-pass filter is specifically designed to allow only low-frequency signals to pass through while attenuating (reducing) the amplitude of higher-frequency signals. This type of filter is widely used in various applications such as audio processing, signal conditioning, and control systems. The functionality of a low-pass filter is crucial in removing high-frequency noise from a signal that is primarily composed of lower frequencies, ensuring that the desired signal can be clearly transmitted or processed without interference from unwanted higher frequencies.

Understanding the characteristics of filters is essential in fields like avionics where signal integrity and clarity are critical, and low-pass filters play a significant role in achieving that within electronic systems.