Dos - Trigger beep in batch file

You can't directly type the beep character in a text editor. To get the beep character, execute echo ^G>>beep.txt on the command line(don't type ^G, but <Control>-G, which will be shown as ^G on the screen. Then, open beep.txt. Copy the beep character and paste it after the echo in your batch file.

Note: Don't forget to turn on your speaker. Otherwise, you will not hear it.