Like World of Warcraft (and probably some other MMOs), Neverwinter has built-in voice chat. Like in World of Warcraft (and probably some other MMOs), its quality is poor compared to a dedicated third party program, not to mention that most people don't necessarily want to engage in conversation while rushing through dungeons with random strangers, so nobody really uses it as far as I can tell.
That is, until you end up grouped with someone who doesn't realise that their V key is set up to be the default push-to-talk key and douses the group in irregular random noises until you get annoyed enough to mute them.
And in my case of course there was also that one time during the Gate Crashers skirmish, when a delighted female voice with a heavy American accent kept giggling about how the Intellect Devourer mobs (brains on legs, basically) looked like "butt monsters". Thank you, anonymous voice. We really needed to hear that, repeatedly.