Notification sound does not exist

Hello....

I'm using Traccar Web Ui 3.9 and it does not have a notification sound when I enter a geofence.
How could a sound be implemented, so as not to be stuck on the screen of the speaker?

Thank you.

Richard.

Dear.
Along with say hello I would like to see how the panic alert is displayed in Traccar ???

GPS 103A Cobán, only a text message arrives on the cell phone.
Thank you.

Dear.
If someone of you can help me in the consultation exposed to the use of the panic button.

Thank you.