IIR Filters

IIR filters, or Infinite Impulse Response filters, are a type of digital filter used in signal processing. Unlike their counterpart, FIR filters, IIR filters use both current and previous input values and also incorporate previous output values in their calculations. This allows them to achieve a desired filtering effect using fewer computations, making them efficient for real-time processing. IIR filters are often applied in audio processing, control systems, and communications to remove unwanted noise or enhance certain frequencies, helping to clarify the desired signals. Their defining trait is that their response theoretically continues indefinitely.