What do you think it sounds like when you talk to people in your Warframe?

Like, when I was babby Tenno doing the main quests (my boyfriend being very quiet on Second Dream spoilers), and my Volt was talking to Konzu to learn about Cetus. What was Konzu hearing? Is it my Operator's voice projected through Volt, or is it Volt's voice, speaking my Operator's words?

I know some frames have voice sounds in their Abilities (eg, Valkyr and Grendel), and I'm sure Protoframe skins use their voices, but does that mean they do the talking?