Flicker noise, also known as 1/f noise, is a type of electronic noise that occurs in various physical systems. It is characterized by its inverse frequency dependence, meaning that its amplitude is higher at lower frequencies. This type of noise is commonly observed in electronic devices, transistors, and even in biological systems, making it a significant factor in signal processing and communication technologies. The origin of flicker noise is not fully understood, but it is believed to be related to fluctuations in the number of charge carriers or defects in materials. Unlike white noise, which has a constant power spectral density across frequencies, flicker noise exhibits a distinct pattern that can affect the performance of circuits and sensors. Understanding and mitigating flicker noise is essential for improving the reliability of electronic systems.