This application containing the best collection of Whistle Sounds for android devices. sounds have been selected very carefully to be a good and fun user experience, we hope you will enjoy using the app and listening to Whistle Sounds. A whistle is an instrument which produces sound from a stream of gas, most commonly air. It may be mouth-operated, or powered by air pressure, steam, or other means. Whistles vary in size from a small slide whistle or nose flute type to a large multi-piped church organ.