Compander vs compressor

1. What does a compander do?
2. What is a compander compressor?
3. What does compander do on a radio?
4. What is companding and why it is needed?

What does a compander do?

How it works. The dynamic range of a signal is compressed before transmission and is expanded to the original value at the receiver. The electronic circuit that does this is called a compander and works by compressing or expanding the dynamic range of an analog electronic signal such as sound recorded by a microphone.

What is a compander compressor?

The name Compander describes a multi-shaft turbomachine, incorporating both compressor and expander stages. The energy generated during the expansion process is returned to the system to improve efficiency.

What does compander do on a radio?

The word companding is actually the combination or blending of the two words compressing and expanding. This two-way radio feature is used when the device itself has a smaller dynamic range capacity and is required to transmit a large dynamic range.

What is companding and why it is needed?

For digital audio signals, companding is used in pulse code modulation (PCM). The process involves decreasing the number of bits used to record the strongest (loudest) signals. In the digital file format, companding improves the signal-to-noise ratio at reduced bit rates.