| 摘要 |
<p>A sound absorbing device, its manufacture method and a manufacture method of a sound insulation room are provided. The sound absorbing device comprises an acoustic transformer and an acoustic resistance structure that are connected with each other, the acoustic transformer enhances the sound pressure and/or impedance of a sound source in the atmosphere and then transfers the sound pressure and/or impedance to the acoustic resistance structure for sound absorption, the cross section of the acoustic transformer is tapered gradually from the furthest position to the acoustic resistance structure to the closest position to the acoustic resistance structure, and the axial length of the acoustic transformer is less than 1/6 of the highest operation wavelength.</p> |
