Mac OS script to display sound alert on application switch or window pop-up

Good afternoon!

At work, everytime I receive a call, it does not matter what application is current in use, system automatically brings up the work system, informing the caller name and so forth.

The problem is: If I need to leave my workplace for a moment, I wouldn't want to worry about incoming calls and it would be perfect if I could solve it by scripting, terminal resource...

Ex.

--> Get current application name;

--> On application switch/ change {

import systemsounds;

play (beep);

}

Thanks in advance.