| 摘要 |
<p>Noise can be transmitted in solid, liquid and gas, but reflected at interface section between two different materials . Using said principle, a noise insulation component of the noise attenuation apparatus of the invention is made from a material differing in character of the liquid within the conducting couduits, to attenuate the noise of the fluid without stoping its flowing . The noise attenuation apparatus of the invention is simple in construction, broad in noise attenuation frequency, small in bulk, and yet little pressure loss to fluid.</p> |
