If you are at a computer and you run a desktop application or a web version of Chaport, you will receive a desktop notification when a new message is received.
You can change the notification sound in your account settings.
If a visitor is at a computer and your website is open in one of the tabs of his/her browser, he/she will receive a desktop notification along with a new message.
You can change the notification sound for visitors in Settings → Appearance.
To learn more, read these articles: