When you receive a chat, you are notified audibly with a sound notification. Sound notifications are enabled by default in Gmail, iGoogle and orkut. Of course, you can always disable them at any time. Here's how:
- Click the gear icon link at the top of any Gmail page, and open the Chat tab.
- In the Sounds section, select Sounds off.
- Click Save Changes.
In iGoogle and Orkut:
- At the bottom of your chat list, select Actions.
- Under Enable sound click No.
Note: Disabling sound notifications in Gmail will not disable them in iGoogle and orkut (and vice versa) automatically. However, if you disable sound notifications in either iGoogle or orkut, the change will automatically reflect in the other.