LOUDSPEAKER, MANUFACTURING METHOD THEREOF, AND MOBILE TELEPHONE USING THE SAME

摘要

There is provided a loudspeaker having two loudspeaker sections arranged in a single frame for use mainly in a mobile communication device such as a mobile telephone. The loudspeaker has a groove in a yoke and a second voice coil arranged in the groove drives a second vibrator. The groove serving as a magnetic gap is formed by machining the yoke. Accordingly, it is possible to eliminate magnetic gap irregularities generated in the conventional assembly. Thus, it is possible to improve accuracy and stabilize the sound pressure frequency characteristic of the loudspeaker.