Whistleinstrument which produces sound from a stream of forced air / From Wikipedia, the free encyclopedia A whistle is a thing that uses a stream of gas (usually air) to make a sound, or the act of making a similar sound called whistling. This short article about technology can be made longer. You can help Wikipedia by adding to it. A metal pea whistle
A whistle is a thing that uses a stream of gas (usually air) to make a sound, or the act of making a similar sound called whistling. This short article about technology can be made longer. You can help Wikipedia by adding to it. A metal pea whistle