Analog transmission is a method of sending information using continuous signals that vary in amplitude, frequency, or phase. This type of transmission is commonly used for audio and video signals, where the information is represented by physical quantities. For example, in traditional radio broadcasting, sound waves are converted into electrical signals that can be transmitted over the air. In analog transmission, the quality of the signal can degrade over distance due to noise and interference. Unlike digital transmission, which uses discrete values, analog signals can be more susceptible to distortion. Despite this, analog methods are still used in various applications, such as television and telephone systems.