| 摘要 |
<p>The invention relates to an electromagnetic loudspeaker having a forced-convection cooling system, which includes a membrane (9) coupled to an oscillator coil (5) and a core (14) made up of a base (6) and a central solid cylindrical pole (15), surrounded by a permanent magnet (3) and a ring (4), the coil passing through an air gap (13) which is defined in the actual core, wherein the core (14) includes an upper disc (16), arranged above the pole (15) and essentially coplanar with the ring (4), the base (6) and the upper disc each being provided with pluralities of respective cooling holes (1, 7), arranged evenly and characterised by including an upper part (2) arranged above the upper disc (16) and containing a plurality of upper notches (11) distributed regularly on the periphery thereof.</p> |
