| 摘要 |
<p>A loudspeaker (1) comprising: a magnet unit (3) which generates a magnetic field; an element suspended for resilient movement round a stable rest position, such as a diaphragm, a cone (5), a dome or other element suitable for radiating sound with selected properties; and an electrical conductor, for instance a speech coil (6), connected to that movable element and having current feed terminals, which conductor (6) is placed in the said magnetic field such that when current is passed through this conductor a force is exerted on the movable element which imparts to the element a deviation from its rest position. In order to effectively prevent degradation and damaging of the conductor (6) the loudspeaker (1) according to the invention has the feature that the conductor (6) is covered by a corrosion and oxidation resistant coating such that entry of the gases stimulating corrosion or oxidation of the conductor (6), particularly oxygen, is prevented.</p> |
