| 摘要 |
PURPOSE: A kernel type earphone is provided to transfer the acoustic sound of a low frequency band by diffusing an acoustic sound through a bobbin and a diffusion plate. CONSTITUTION: An oscillating member(120) outputs an acoustic sound through electrical vibration. A bobbin(130) absorbs a powerful sound in the vibration state of the oscillating member. The bobbin diffuses the acoustic sound. A mastoid(140) includes a protrusion(141) combined with the oscillating member. The mastoid outputs the acoustic sound of a high tone band delivered from the oscillating member. A diffusion plate(150) is attached to along the surroundings of the edge of one side having no protrusion of the mastoid in a ring shape. The diffusion plate diffuses an acoustic output from the mastoid. The diffusion plate is formed more widely than the outer circumference of the mastoid. |
