不同铺设方式对木奇消音降噪能力的影响  

Effects of different laying methods on noise reduction capabilities of mulch

作　　者：沈亚鹏[1] 耿鹏 蔡亚慧 吴坤[1] SHEN Yapeng;GENG Peng;CAI Yahui;WU Kun(College of Life Science,Henan Agricultural University,Zhengzhou 450002,China)

机构地区：[1]河南农业大学生命科学学院,河南郑州450002

出　　处：《河南农业大学学报》2020年第4期698-703,共6页Journal of Henan Agricultural University

基　　金：河南省科技攻关项目(162102310094)。

摘　　要：为了探究木奇消音降噪能力,设置不同铺设面积(1、2.25、4 m^2)与不同铺设厚度(3、6、9 cm)以及不同监测点距离(5、10 m)研究木奇对噪音强度的影响,并以1 kHz的单频音为噪音源,测定木奇处理后试验音波形图、频谱图和柱线图。结果表明,铺设木奇可以有效降低试验音分贝值,木奇消音降噪能力随着铺设面积与铺设厚度的增加而增加。当木奇铺设厚度9 cm,铺设面积4 m^2,监测距离5 m时,经过木奇降噪处理的噪音分贝值比空白对照降低了24.1 dB,效果最佳。与对照相比,经木奇处理的声音其波形振幅由-0.5~0.5降低至-0.1~0.1,在频谱图中表现无序,柱线图上降低56%。In order to investigate the noise reduction capabilities of mulch,different laying areas(1,2.25,4 m^2),different laying thicknesses(3,6,9 cm)and different monitoring distances(5,10 m)were set up to study the influence of mulch on the intensity of noise.Using single-frequency tone at 1 kHz as the experimental tone,the waveform,spectrum,and bar graph of the experimental tone after mulch processing were determined.The results show that laying mulch could effectively reduce the decibel value of experimental tone,and the noise reduction ability of mulch increased with the increase of the laying area and thickness within a certain range.When the laying thickness was 9 cm,the laying area was 4 m^2,and the laying distance was 5 m,the noise decibel value after the noise reduction treatment of mulch was 24.1 dB lower than that of the blank control,and the effect was the best.Compared with the control,the waveform amplitude of the experimental tone was reduced from-0.5~0.5 to-0.1~0.1 after mulch processing,displaying disorder in the spectrum diagram and 56%reduction in the bar graph.

关 键 词：木奇 有机覆盖物 单频音 消音降噪 

分 类 号：TQ9[化学工程] X703[环境科学与工程—环境工程]