The principle of the hand-cranked sheep call box

Sheep Barking Box is a toy that can make sound by squeezing and shaking, this kind of sound-making toy is generally produced by squeezing the air or shaking the box to produce vibration, to achieve the purpose of sound.

Sheep Barking Box is a toy, inverted sound, do not need batteries horn is generated by inverted air pressure and occurs, environmental protection and pollution-free, clear and loud sound.