What is the approximate bandwidth of a typical single sideband (SSB) voice signal?

An SSB voice signal takes the audio frequencies of a human voice, which typically range from about 300 to 3000 Hz, and shifts them into the radio frequency spectrum. Because SSB transmits only one sideband and no carrier, the required RF bandwidth exactly matches the transmitted audio bandwidth. Therefore, a typical SSB voice signal occupies about 3 kHz of bandwidth. This is exactly half the bandwidth of a traditional AM signal (6 kHz), which transmits both an upper and lower sideband. This narrow 3 kHz footprint makes SSB highly spectrum-efficient, allowing many more stations to fit into crowded HF bands compared to wider modes like FM or AM.