What is distance between the lowest and highest tones that a voice or instrument produces is?

The distance between the lowest and highest tones that a voice or instrument can produce is called the "range." For voices, this is typically measured in octaves, and ranges can vary significantly among different types of voices (soprano, alto, tenor, bass). Instruments also have specific ranges depending on their design and construction. The wider the range, the more versatile the voice or instrument is in producing varied musical notes.