Abstract: A sound producing device which can produce a loud sound is disclosed. The device includes a moveable frame and a flexible and hermetically sealed cylindrical bag enclosed in such moveable frame as well as a bellows extensible and compressible in the axial direction of the frame. The bellows is intermittently driven so as to compress air contained therein and to release it. The compressed air is abruptly released to break a sheet of paper and produce the loud sound.