Analog signals are continuous signals that represent physical quantities. They vary smoothly over time and can take on an infinite number of values within a given range. Common examples of analog signals include sound waves, temperature readings, and electrical voltages. These signals are often used in traditional audio and video equipment, where they can capture the nuances of real-world phenomena. In contrast to digital signals, which represent data in discrete steps, analog signals can provide a more natural representation of information. However, they are more susceptible to noise and distortion, which can affect the quality of the transmitted information. Devices like microphones and thermometers typically utilize analog signals to measure and convey data.