Having a “Voice”

What does it mean to “have a voice” for Anglo-American speakers and for the Blackfeet?

How does one attain a “voice” from these cultural perspectives? (please read the material i uploaded and watch the video before writing. And i want a discussion form but not eassy) link: https://www.youtube.com/watch?v=icE-xPDDDKM&feature=youtu.be)