The invention discloses a mini-type acoustical generator and relates to the technical field of electroacoustic products. The mini-type acoustical generator comprises a shell, a vibrating
system and a
magnetic circuit system, wherein the vibrating
system and the
magnetic circuit system are contained in the shell. The
magnetic circuit system comprises a
magnet yoke installed on the shell, and the vibrating system comprises a vibrating diaphragm and a
voice coil. A rear sound aperture of the mini-type acoustical generator is formed in the lateral side of the mini-type acoustical generator, the part, corresponding to the rear sound aperture side, of the shell and the
magnet yoke are sealed by using a
metal sheet, one part of the
metal sheet is combined with the
magnet yoke in a sealed mode, and the other part of the
metal sheet is combined with the shell in a sealed mode. The rear sound aperture is formed in the
metal sheet. By means of the mini-type acoustical generator, the technical problem that in the prior art, a mini-type acoustical generator with the rear sound aperture in the lateral side has limitations is solved; in the mini-type acoustical generator, the performance is expanded, the mini-type acoustical generator is simple in
assembly, meanwhile, good in water proof performance, long in service life and capable of meeting the requirements for
thinning development of portable
electronic equipment.