Whistler optionally controlling the sounds

摘要

The present invention relates to a whistle with adjustable pitch.;Whistle is a common acoustic signal tool that sends various signals by sound. These whistles produce fixed sounds according to their size, and thus various types of products have been developed, but there are no whistles that can use the pitch of the user's desired form.;The present invention is to provide a whistle that allows the user to use the desired pitch by detachable piston-type regulator on one side of the whistle. In particular, by attaching a detachable controller in various forms of long and short gwanghyup can use the pitch arbitrarily, according to the level of the user to provide a whistle that can even play music.