👉 Filter engineering is a critical process in signal processing and communications that involves designing systems or algorithms to selectively allow certain frequencies or features of a signal to pass through while attenuating others. This is achieved through the use of various techniques such as low-pass, high-pass, band-pass, and band-stop filters, which are implemented using physical components like capacitors and inductors or digital methods like finite impulse response (FIR) and infinite impulse response (IIR) filters. The primary goal of filter engineering is to enhance signal quality, reduce noise, and isolate specific components of interest, thereby improving the overall performance and reliability of communication systems, audio processing, and data analysis applications.