| 摘要 |
The invention relates to an arrangement at a boiler plant or other cavity (4), where a pure tone of low frequency sound, preferably infrasound, with high intensity is generated. In certain cases, part of the acoustic power generated by an infrasound generator can leak out from the cavity (4) through ducts (5) for the evacuation of flue gases or similar tubes or pipes. According to the invention, a sound reflector (6) is installed in connection with said duct (5), in order to reflect leaking low frequency sound, if any, back into the cavity (4). |
