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目的 探讨目前影响噪声车间控制室隔声效果的主要因素 ,提高防护水平。方法 对4 6 7间噪声车间控制室进行隔声效果的测定 ,分析不同围护材料、门窗结构、密闭状况等因素对隔声效果的影响。结果 各因素对总变异控制室隔声效果的贡献 (Eta2 值 ) :密闭状态 ( 0 .16 8) >围护材料( 0 .0 80 ) >窗、门结构 ( 0 .0 30、0 .0 2 9) >噪声声压级、频率特性 ( 0 .0 0 8、0 .0 0 6 )。在密闭状态下 ,不同围护材料隔声效果 :双砖 ( 19.6± 3.5 )dB(A) >单砖 ( 15 .4± 3.4 )dB(A) >木板 ( 13.1± 1.6 )dB(A)或铝合金玻璃 ( 13.4± 2 .5 )dB(A) ,差异有显著性 (P <0 .0 1) ;门结构相同窗结构不同的单、双砖 4组中有 3组密闭窗隔声效果 [( 15 .9± 2 .8)、( 18.7± 3.6 )、( 19.3± 2 .5 )dB(A) ]明显高于开关窗 [( 14 .1± 2 .4 )、( 14 .9± 2 .3)、( 16 .5± 2 .4 )dB(A) ],有 2组双层窗 [( 18.7± 3.3)、( 2 2 .6± 3.8)dB(A) ]明显高于密闭窗[( 15 .9± 2 .8)、( 19.9± 3.0 )dB(A) ],差异均有显著性 (P <0 .0 1、P <0 .0 5 ) ;窗结构相同门结构不同的单、双砖 6组中只有 1组的层板门隔声效果 [( 18.7± 3.6 )dB(A) ]明显高于单板门 [( 15 .9± 2 .8)dB(A) ],差异亦有显著性 (P <0 .0 1)。结论 根据车间噪声
Objective To explore the main factors that affect the sound insulation effect of noise control room and improve the level of protection. Methods The noise control effects of 476 noise workshop control rooms were measured and the influence of different enclosure materials, door and window structure, airtightness and other factors on the sound insulation effect was analyzed. Results The contribution of each factor to the sound insulation effect of the total variation control room (Eta2 value): confined state (0.168)> enclosure material (0.080)> window and door structure (0.030, 0.0 .0 2 9)> Sound pressure level, frequency characteristics (0.080, 0.060). The sound insulation effect of different enclosure materials in airtight condition is: double brick (19.6 ± 3.5) dB (A)> single brick (15.4 ± 3.4) dB (A)> wood board (13.1 ± 1.6) dB Aluminum alloy glass (13.4 ± 2.5) dB (A), the difference was significant (P <0.01); the same structure of the door window structure with different single, double brick 4 groups of three closed window sound insulation effect (15.9 ± 2.8, 18.7 ± 3.6, 19.3 ± 2.5, dB (A)] were significantly higher than that of the switch window [(14.1 ± 2 .4), (14.9 ± There were 2 groups of double windows [(18.7 ± 3.3), (22.6 ± 3.8) dB (A)] higher than that of airtight (15.9 ± 2 .8), (19.9 ± 3.0) dB (A)], the differences were significant (P <0.01, P <0.05) (18.7 ± 3.6) dB (A)], which is only one group of single and double bricks, is significantly higher than veneer doors [(15.9 ± 2 .8) dB , The difference was also significant (P <0. 01). Conclusion is based on workshop noise