| 摘要 |
<p>The loudspeaker (1) has a sound-absorbing element (2) that is excited by vibrations (5), and a drive (3) that converts electrical acoustic signal in the vibrations. The element is made of a fire resistant and heat insulating material. The element is formed of two layers (6, 8) and connected with the drive via a heat insulating connecting element (10). The drive has a heat insulating shield (11), and the element is formed as a rigid disk. A temperature sensor determines temperature of the element.</p> |
