Dynamic exciter and loudspeaker using the same

摘要

A dynamic exciter includes a frame, a magnetic circuit assembly, which includes a permanent magnet and a yoke and through which a magnetic circuit generated by the permanent magnet extends, and an electromagnetic coil positioned across a magnetic gap formed in the magnetic circuit assembly. A first suspension member supportingly connects the magnetic circuit assembly to the frame member. A second suspension member supportingly connects the electromagnetic coil to the frame member. The frame is adapted to be attached to a diaphragm of a loudspeaker. The exciter has two mechanical resonance systems through which vibrations are transmitted to the frame: one being formed by the magnetic circuit assembly and the first suspension member and the other being formed by the electromagnetic coil and the second suspension member.