cutoff frequency

The cutoff frequency is the point in a system, like a filter or amplifier, where the signal's strength starts to significantly decrease. Think of it as the threshold that determines which frequencies (or tones) pass through and which are reduced or blocked. Frequencies below the cutoff often pass easily, while those above are attenuated, helping to shape or limit the signal. It's a key concept in designing audio, radio, and electronic systems to control the range of signals being processed, ensuring only desired frequencies are transmitted or detected efficiently.