The invention discloses a full-frequency sound-resisting board, which comprises a board body. The board body comprises a sound-insulating backplane layer, a mass particle mixing layer, a sound-insulating board layer, a low-frequency damping layer, a sound-absorbing material layer and a sound-absorbing orifice plate layer arranged in sequence. The board body is surrounded by a splicing orifice, and the relative two splicing orifices cooperate with each other. By adding sound absorption orifice plate, sound absorption filling material, low frequency damping, sound insulation board, mixing layer of high, medium and low density mass particles and flexible damping, micro-porous thin plate and sound insulation board, the full frequency noise can be effectively reduced and the transmission of high, medium and low frequency can be blocked. Through technical verification, the performance of the full-frequency sound absorption and insulation board is stable, no resonance point, and the sound absorption and insulation capacity can reach more than 50 decibels, especially in the control effect of low-frequency noise and infrasound, which is better than the conventional sound absorption and insulation board. It effectively solves the problem of high, middle and low-frequency noise, and achieves the effective reduction of the full-frequency noise in the field of environmental protection and noise reduction.
【技术实现步骤摘要】
全频率阻声板
本专利技术涉及隔音板材领域,尤其涉及一种全频率阻声板。
技术介绍
噪声是指发声体做无规则振动时发出的声音。声音以波的形式在一定的介质(如固体、液体、气体)中进行传播。频率是用Hz作单位。在人耳范围内是在20Hz--250Hz是低频。而高频则是10000Hz--20000Hz的声音加噪音,一般人所能听到的声音在20Hz--20000Hz之间,以下的是次声波,以上的是超声波。机械设备噪声均为全频率的噪声,根据噪声特性分析,高频、中频、低频声音、次声波占比不尽相同。同样艇船设备噪声均为全频率噪声,根据艇船设备运行工况、负荷的变化,发出的噪声频率也会发生改变,且声波在水中的传播速度比空气中的传播速度更快,且声衰减特性更差,尤其是低频噪声、次声波的衰减难度更大。对于中高频噪声,其解决办法是根据频率特性、声压级的大小等参数,采用吸声措施和高密度隔声材料进行复合降噪;对于中高频的衰减特性,这类复合降噪材料能够取到非常优秀的降噪效果。对于低频噪声,其解决办法是根据低频特性、和声压级大小等参数,采用小孔吸声孔板面层,提高内部吸声材料的密度,并在复合吸隔声材料内部增加阻尼层,我们针对不同低频频率特点,根据频率比、阻尼比与传递比关系,采用相应的阻尼复合结构,可以使整个吸隔声板的低频被吸耗量大幅度提高。由于次声波的穿透力更强、声绕射能力也更强、声衰减特性更差,且声波辐射到水介质中的波长比空气中的波长更长,传播距离更远等因素。须在声波辐射到艇船外壳的过程中和艇船外壳辐射到水中的过程中增加有效超低频降噪措施。本专利技术提出了一种阻尼二级浮置隔声及质量颗粒耗能降噪结构。对 ...
【技术保护点】
1.一种全频率阻声板,其特征在于:包括板体,所述板体包括依次层叠设置的隔声背板层、质量颗粒混合层、隔声板层、低频阻尼层、吸声材料层和吸声孔板层,所述板体四周设置有拼接企口,相对的两拼接企口相互配合。
【技术特征摘要】
1.一种全频率阻声板,其特征在于:包括板体,所述板体包括依次层叠设置的隔声背板层、质量颗粒混合层、隔声板层、低频阻尼层、吸声材料层和吸声孔板层,所述板体四周设置有拼接企口,相对的两拼...
【专利技术属性】
技术研发人员:郑兴钊,沈祥龙,汪国运,
申请(专利权)人:杭州静之源噪声控制技术有限公司,
类型:发明
国别省市:浙江,33
还没有人留言评论。发表了对其他浏览者有用的留言会获得科技券。