Sound insulation and noise reduction structure using ultrasonic waves

The utility model discloses a sound insulation and noise reduction structure utilizing ultrasonic waves, and relates to a sound insulation and noise reduction structure. The problem that an existing noise reduction method is poor in noise reduction effect on low-frequency noise is solved. The structure comprises two sound absorption material layers and an ultrasonic generator located between the two sound absorption material layers. The frequency of ultrasonic waves emitted by the ultrasonic generator ranges from 20 kHz to 100 kHz. The sound insulation and noise reduction structure is good innoise reduction effect on low-frequency noise, good in control effect on high-frequency noise and medium-frequency noise, and capable of isolating and removing the noise in a non-selective mode. The utility model is applied to the field of noise control. 一种利用超声波的隔音降噪结构，涉及一种隔音降噪结构。是要解决现有的降噪方法对低频噪声的降噪效果较差的问题。该结构包括两层吸声材料层以及位于两层吸声材料层之间的超声波发生器。所述超声波发生器发出的超声波频率为20kHz～100kHz。本实用新型的隔音降噪结构对低频噪声的降噪效果较好，同时也对高频、中频噪声的控制效果都较好，可以无选择性的隔除