| 摘要 |
<p>A speaker apparatus capable of reproducing from low-pitched to high-pitched sounds and a voice reproduction system employing the same. The speaker apparatus includes a speaker unit (10) in which a primary coil (1) is mounted in a gap portion between a plate and a centre pole of a magnetic circuit, a secondary coil is disposed within the gap in such a manner as to be fixed to a vibration plate, and a secondary electric current is induced in the secondary coil by a signal current flowing through a primary coil (1), thereby operating the vibration plate; and a speaker driving circuit (520,530) which drives the primary coil of the speaker unit with an analog sound signal, wherein the speaker driving circuit (520,530) interrupts said analog sound signal at a frequency higher than an audible frequency. <IMAGE></p> |
