The terminology refers to a configuration of components designed to transmit audio signals without physical cables, offering mobility and convenience. Typically, such a setup includes a microphone to capture sound, a transmitter to encode and send the audio signal wirelessly, and a receiver to decode and output the audio. An example is a handheld microphone used by a public speaker that sends audio to a receiver connected to a sound reinforcement system.
This technology offers significant advantages in various scenarios, enhancing flexibility and reducing cable clutter. Historically, wired microphone systems were the standard, but wireless technology has evolved to provide comparable audio quality with increased freedom of movement. The adoption of these systems has grown due to their capacity to improve performance accessibility across diverse applications, including live music, broadcasting, and presentations.