A compander, shortened from the terms "compressor" and "expander," refers to a device or technique used in the field of audio signal processing. It helps mitigate the loss of audio quality during transmission or recording by compressing the dynamic range of the signal at the source and then expanding it to its original range at the destination.
In its physical form, a compander typically consists of two linked circuits: a compressor and an expander. The former compresses the dynamic range of the incoming audio signal, effectively reducing the volume difference between loudest and softest sounds. The expander, on the receiving end, expands the compressed signal back to its original dynamic range, thus restoring the original audio quality. This process aims to maintain the integrity of the audio signal by minimizing the impact of background noise, hisses, or other disturbances.
Within the technique of companding, different algorithms and settings can be employed to manipulate the levels and characteristics of the compression and expansion processes. The compander's application extends to various industries, such as telecommunications, music production, broadcasting, and voice recording systems. It allows for more efficient signal transmission, enhances audio fidelity, and ultimately improves the listening experience for end-users.
With its ability to compress and expand audio signals, a compander plays a crucial role in overcoming the limitations posed by transmission or recording mediums, ensuring consistent audio quality, and minimizing unwanted noise.
