Abstract: Disclosed are a bone conduction speaker module and bone conduction earphones having the bone conduction speaker modules. More particularly, the present invention relates to a bone conduction speaker module and bone conduction earphones having the bone conduction speaker modules, wherein the bone conduction speaker modules can accurately output sound, can stably output sound with fewer vibrations, enable a wearer to comfortably use the earphones, can prevent strain to the wearer by minimizing influence of magnetic force, can facilitate wearing of the earphones, and can prevent an accident from occurring by allowing the wearer to hear external sounds. To this end, a bone conduction speaker module used in earphones, headphones, and a hearing aid, includes: a housing including a first casing covering a portion coming into contact with a human body and a second casing covering a side of the first casing; a magnet part; and a voice coil part.

Abstract: The present invention, related to a stereophonic apparatus having multiple switching function which mixes the sound signals output from multiple sound apparatuses to output them at once and enables to output multiply or selectively, has an audio signal generating unit for generating an audio signal, a sound signal controlling unit for outputting a sound signal to a sound signal input terminal of an external sound apparatus and controlling path of a sound signal output from a sound signal output terminal of said external sound apparatus, a mixing unit for generating a mixed sound signal by mixing an audio signal input from said audio signal generating unit and a sound signal input through said sound signal controlling unit, an audio amplifying unit for amplifying a mixed sound signal input from said mixing unit, and an output unit for outputting a mixed sound signal amplified by said audio amplifying unit.