Which mode uses digital voice in amateur radio?

Digital Mobile Radio (DMR) is a digital voice mode that allows for clear voice communications over amateur radio. It uses a digital signal to transmit voice, making it less susceptible to interference and providing clearer audio quality compared to traditional analog modes like FM and AM. DMR operates in a time-division multiple access (TDMA) format, allowing for efficient use of the available spectrum by enabling multiple conversations on the same frequency without interference.

This digital mode supports not only high-quality voice communication but also data transmission, which is a significant advantage for amateur radio operators interested in integrating voice and data services. The shift towards digital modes like DMR is also reflective of ongoing advancements in technology and the increasing demand for reliable communication methods in various scenarios, including emergency and public service communications.

On the other hand, FM and AM are analog modulation techniques primarily used for voice communication but do not incorporate digital processing or the advanced features of digital modes. SSTV, while a visual mode that transmits images, does not represent digital voice communication. DMR stands out because of its specific design for digital voice applications within the amateur radio spectrum.