Which of the following is a common digital voice communication method?

DMR (Digital Mobile Radio) is widely recognized as a common digital voice communication method due to its efficient use of spectrum and ability to provide high-quality audio. DMR is specifically designed for mobile radio communications, allowing for two-way voice communication with enhanced clarity and reduced interference compared to analog systems. It operates using time-division multiple access (TDMA) technology, which enables multiple users to share the same frequency without causing excessive congestion. This makes it particularly beneficial in environments requiring reliable and crystal-clear communication, such as in public safety, transportation, and commercial industries.

Additionally, DMR supports features such as text messaging and GPS location data transmission, which further enhances its capabilities beyond just voice communication. This combination of features ensures that users can rely on DMR for practical and efficient communication solutions in various applications.