Abstract
This invention discloses a module of a mini speaker that can increase bass pitch. This invention can be applied to a portable device such as a mobile phone, a hand-held videogame, or a PDA. This invention is composed of a resonant box, a trench, and a pipe. At a lateral edge of the resonant box, there are two apertures individually connected to the trench and the pipe. There is a driver speaker in the trench. The pipe is a bass-pitch reflecting pipe. The volume of sounds emitted from the pipe corresponds to the area and length of the pipe, but not to the shape. As a result, by this invention, bass-patch reflecting pipes can be designed in various shapes according to different required shapes for various mobile phones, etc. The bass-pitch reflecting pipe can increase bass-pitch frequency responses of the mini speaker so that even though the volume of a mobile phone becomes smaller, the effect of the bass-pitch frequency response can still be maintained.