Is there any way to disable the vibrations/loud noise when you get a Skype message? I have skype open on my desktop and the phone is on my desk, and whenever I chat with someone, the phone starts vibrating and being very loud, at every single message.
I would like to set it to be silent, but couldn't find the settings anywhere. Is there any way to disable this annoying behavior?

Ideally, it would be very nice to have it beep/vibrate only at the first message in a conversation, and STFU for the other messages.