Real-time voice communications over the Internet. It's like IRC; but it's not typing and reading; it's talking and listening. It's like a telephone; but software, a sound card, a microphone, and speakers are used instead.
Communication using a microphone. See video chat
Audio message exchange between on-line users. It has many applications. All you need is a computer connected to the Internet and a program for this purpose which can be found on-line and free of charge.
Instead of using an Instant Messaging service to type your messages back and forth to a friend, some services like QQ offer a voice-chat option where, if you are both online and both have QQ, speakers and a microphone (or a headset), you can actually physically talk to the other person as if you were on the phone but using the Internet instead of a phone line. The bonus of voice chat is that other than your standard bandwidth-usage or Internet dial-up costs, the call is free – perfect for international conversations.
Voice Chat tool enables two or more to communicate via microphone and speaker conference call style over the internet connection in real time. Alternatively, a functionally similar tool is used to set up and manage a conference call using the telephone system.
Voice chat is a modern form of communication used on the Internet. The means of communicating with voice chat is through any of the messengers, mainly Yahoo!, AOL or MSN Messenger. Voice chat has led to a significant increase in distant communications where two people from opposite ends of the world can talk almost free of cost.