How to do a loud fingerless whistle First it's good to learn how to do a finger whistle before you try to learn a fingerless whistle. Start by relaxing your tongue and fold back the tip of the tongue toward the back of your throat. Then make a circle with your index finger and thumb. Put your fingers in your mouth touching your teeth and your tongue. Then seal your lips around your fingers and blow out. The harder you blow the louder the whistle. To do the fingerless whistle wrap your lips over your teeth and put your tongue against your top lip. Push your bottom jaw out. Blow through your lips and you will do a fingerless whistle.