| 摘要 |
The invention concerns a device for active attenuation of sound waves produced by an exhaust line comprising a chamber (10) for exhaust gas circulation, a loudspeaker (12) and means for securing the loudspeaker (12) on the chamber (10). The chamber (10) comprises a wall (34) provided with an opening (36) bordered at its periphery with a support surface (40) for the loudspeaker (12). The securing means comprise a casing (14) provided with at least a support surface (54, 64) on the loudspeaker (12) and means (16) for stressing the casing (14) towards the chamber (10), the loudspeaker (12) being maintained enclosed between the chamber (10) and the casing (14). The invention is applicable to a motor vehicle exhaust line. |
