Outlook can give you an audible queue that you have a new message that just arrived.
To set Outlook for playing sound when receiving new mail follow the instructions:
1. Go to the Control Panel.
2. View the Control Panel in Classic View.
3. Select Sound.
4. Select the Sounds tab.
5. From the Program list, scroll down and select New Mail Notification.
6. Click the Browse button and go to the desired WAV file that you want to be the default notification. Select the file and click the Open button.
7. Click the OK button to close the Sound window.
8. Open Outlook.
9. Go to the menu, click Tools and select Options.
10. Click the E-mail Options button.
11. Click the Advanced E-mail Options button.
12. Go to the When new items arrive in my Inbox section and make sure that the Play a sound checkbox is checked.
13. Click the OK buttons to close the three options windows.
Each time you receive a new item, you will hear the selected sound.