| 摘要 |
The present invention relates to an acoustic device for linear perceived-sound attenuation, comprising a channel (1) along which said sound propagates from an entry (2) to an exit (3), characterized in that it comprises, combined so as to make the perceived sound undergo a linear attenuation, at its entry (2), means (4) for attenuating and setting into resonance sound propagating through the latter as far as at least one filter (6) opening as exit (3), onto means (7) for accentuating the filtered sound, in particular its short-wave frequencies, said accentuating means consisting of a frustoconical portion of said channel (1) having a cross section that increases from said housing (5) towards said exit (3). |
