I am only a user, so i can't tell you if it is intentional or not.
However i can help you with the sound.
First, you will need to enable developer console.
Then you will need to press the key binded or F10.
Finally, you will need to type in Stopsound.

Alternatively, you can type in "Bind [key] stopsound" so that when you press [key] it will execute stopsound.
For exemple, "Bind k stopsound" will stop everysound when k is pressed.
for aditionnal help, you can type "bind" in console, it will show you how to type a bind command.

do not put the "