| 摘要 |
<p>The invention relates to a sound-insulating door designed in particular to seal off chambers for testing noisy machinery such as jet engines (reactors). According to the invention, the door comprises the following internal structure: - a rigid outer metal sheet (12), - a sound-insulating material (13), - an elastically mounted metal sheet (14), - a sound-insulating material (15), - a rigid outer metal sheet (16). The use of a flexibly-mounted central metal sheet (14) allows interference phenomena which may exist between the insulating materials (13 and 15) to be eliminated. The invention concerns manufacturers and users of sound-insulating materials. <IMAGE></p> |
