Companding is a technique used in audio processing that combines compression and expansion to manage the dynamic range of sound. It reduces the volume of loud sounds and increases the volume of soft sounds, making audio signals easier to transmit and store. This is particularly useful in telecommunications and music production, where maintaining sound quality is essential. The term "companding" comes from the words "compressing" and "expanding." In practice, devices like audio compressors and expanders work together to ensure that the final output maintains clarity and detail. This method helps prevent distortion and improves overall listening experiences in various applications, including broadcasting and recording.