notification length?

[AC Question]

When I get a email.facebook or message the notification sound just keeps going. Is there a way I can shorten it?

 

[B. Diddy]

Welcome to Android Central! Which phone? Is the tone a true notification tone, or are you using a ringtone (which is typically longer than a notification tone)? Or is the tone repeating immediately and constantly, or is it intermittently repeating?