“网上语音聊天”用英语怎么说？

online voice chat

Use Skype and you will be able to chat with many people online in English, and many other languages.

Download Skype at www.skype.com

However, beware that you are on Beijing time. That means, for example with people like me in California, you are 15 hours ahead of me.
For example, when I am Friday 11:00am, you are already Saturday 2:00am.

Also, no one else outside of China use QQ. We cannot sign you QQ because we do not have Chinese mobile phone numbers. So don't ask chat with overseas people to chat with you on QQ.

Online voice-enabled chat

在线语音聊天
online voice chat

On-line pronunciation chats

online voice chat

vocal chat on the internet