噪声监测设计方案

机电系实训基地

躁声监测

课程：躁声污染控制技术 班级：环境监测与治理技术081班 组别：第四组 成员： 页脚内容

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噪声污染管理方案

目录

一、 计划制定 ...................................................................................................................................................... 2 二、方案设置及监测点选取 ............................................................................................................................ 3

1，生产环境噪声监测 ............................................................................................................................... 3 2，厂界噪声监测 ....................................................................................................................................... 3 3，机器设备噪声监测 .............................................................................................................................. 3 三、平面图及布点设置 ..................................................................................................................................... 3 四、监测数据及处理 ..........................................................................................................................................4

1，监测点1数据及处理 ........................................................................................................................... 5 2，监测点2数据及处理 .......................................................................................................................... 6 3，监测点3数据及处理 .......................................................................................................................... 7 4，监测点4数据及处理 ......................................................................................................................... 8 5，监测点5数据及处理 ........................................................................................................................ 10 6，监测点6数据及处理 ......................................................................................................................... 11 7，监测点7数据及处理 ........................................................................................................................ 12 8，监测点8数据及处理 ........................................................................................................................ 13 9，监测点9数据及处理 ........................................................................................................................ 15 10，监测点10数据及处理 .................................................................................................................... 16 11，监测点11数据及处理 ...................................................................................................................... 17 12，监测点12数据及处理 ..................................................................................................................... 18 13，监测点13数据及处理 .................................................................................................................... 20 14，监测点14数据及处理 .................................................................................................................... 21 15，监测点15数据及处理 .................................................................................................................... 22 16，监测点16数据及处理 .....................................................................................................................23 五、降噪方案设计 ........................................................................................................................................... 24

1，厂房噪声评价 ..................................................................................................................................... 25

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噪声污染管理方案

2，厂房规模及噪声现状 ...................................................................................................................... 25 3，吸声降噪设计 .................................................................................................................................... 25 六、参考文献 ..................................................................................................................................................... 27

一、计划制定

1，第四周(9月20号--9月26号)接受并分析任务,利用网络及图书馆资料查阅相关内容。

2， 第五周(9月27号--10月3号)进行实地考察,确定监测方案并实施监测。 3，第六周(10月27号--10月3号)对监测数据进行分析并进行降噪设计。

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噪声污染管理方案

4，第七周(10月4号--10月10号)整理监测成果，并将其设置成Word及PPt形式递交老师审阅。

5，第八周(10月11号--10月17号)展示设计成果。

二、方案设置及监测点选取

1，生产环境噪声监测

根据《工业企业噪声控制设计规范》(GBJ87-85)规定测点选择原则:若车间各处A声级波动小于3dB,则只需在车间内选择1-3个监测点,如果车间各处A声级波动大于3dB,须将车间分成若干区域,使任意两个区域的声级波动大于或等于3dB,在每个区域里分别设置1-3个监测点。

根据实地监测将整个实训基地划分为三个区域如图所示，在每个区域内均布置三个监测点，如平面图所示。

测量高度在人耳附近。 2，厂界噪声监测

因为实训基地东侧为大学生后动中心，南侧为六教，西侧为农田，北侧为汽车系实训基地，将厂界监测点布置在敏感区，即东侧及南侧，在东侧布置两个监测点，南侧布置一个监测点，其位置如图一所示。

监测点距厂界一米，监测高度>1.2m。 3，机器设备噪声监测

由于车间内设备较多，所以仅选择了一台机器进行监测。因为机械设备尺寸大于一米，根据相关规定其监测点选择在据设备表面一米处，高度为半个机器设备高度，选择四个监测点。

三、平面图及布点设置

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噪声污染管理方案

设备名称一览表

注：图中三区内均为数控机床， 1——16为监测点位置

图1 平面图

四、监测数据及处理

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噪声污染管理方案

1，监测点1数据及处理

79 77.9 77.6 77.3 78.8 77.9 77.5 77.2 78.7 77.8 77.5 77.2 78.4 77.8 77.5 77.2 78.4 77.8 77.5 77.2 78.4 77.8 77.5 77.1 78.4 77.8 77.5 77.1 78.3 77.7 77.5 77.1 78.3 77.7 77.4 77.1 78.2 77.7 77.4 77.1 78.1 77.7 77.4 77.1

78.1 77.7 77.4 77.1 78.1 77.7 77.4 77.1 78.1 77.7 77.4 77.4

78 77.7 77.4 77

78 77.6 77.4 77 78 77.6 77.3 77 77.9 77.6 77.3 77 77.9 77.6 77.3 77 77.9

76.1

76.1

76.1

LeqLL210L9078.276.72506077.46077.4dB

76.9 76.9 76.9 76.8 76.8 76.8 76.8 76.8 76.7 76.7 76.6 76.6 76.6 76.6 76.5 76.5 76.5 76.3 76.3 76.1

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噪声污染管理方案

2，79.8 78.7 78.3 77.7 测79.7 78.7 78.3 77.7 数79.6 78.6 78.3 77.7 及79.6 78.6 78.3 77.6 理 79.5 78.6 78.3 77.5 79.4 78.6 78.3 77.5 79.4 78.5 78.2 77.5 79.3 78.5 78.2 77.5 79.2 78.5 78.2 77.5 79.1 78.5 78.1 77.4 79 78.4 78.1 77.4 78.9 78.4 78 77.3 78.9 78.4 78 77.3 78.9 78.4 78 77.3 78.8 78.4 78 77.3 78.8 78.4 77.9 77.2 78.8 78.4 77.9 77.1 78.8 78.4 77.9 76.9 78.8 78.3 77.8 76.9 78.7

78.3

77.8

76.8

22LeqL50L10L9079.176.56078.16078.2dB

76.8 监76.8 点276.8 据76.8 处

76.7 76.7 76.6 76.6 76.5 76.5 76.5 76.5 76.4 76.4 76.2 76.1 76 76 76 76

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噪声污染管理方案

80.8 3，80.7 测80.7 数80.7 及80.7 理 80.5 80.5 80.4 80.4 80.3 80.3 80.3 80.3 80.3 80.2 80.2 80.2 80.1 80.1 80.1

80.1 79.6 80.1 79.5 80 79.5 80 79.5 80 79.5 80 79.5 80 79.5 80 79.4 79.9 79.4 79.9 79.4 79.9 79.4 79.9 79.4 79.8 79.4 79.8 79.4 79.8 79.3 79.8 79.3 79.7 79.3 79.6 79.2 79.6 79.2 79.6

79.2

79.1 78.2 79.1 78 79.1 78 79 77.9 79 77.9 78.9 77.8 78.8 77.8 78.8 77.8 78.7 77.7 78.7 77.6 78.7 77.5 78.7 77.5 78.6 77.5 78.6 77.3 78.5 77.2 78.5 77.1 78.4 77 78.4 77 78.4 77 78.3

77

监点3据处

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噪声污染管理方案

LL2LeqL109080.377.52506079.46079.5dB

4，监测点4数据及处理

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噪声污染管理方案

80.2 78.8 78.1 77.7 80.1 78.7 78.1 77.7 80 78.7 78.1 77.6 80 78.7 78.1 77.5 79.7 78.7 78.1 77.4 79.4 78.7 78 77.4 79.2 78.7 78 77.4 79.2 78.7 78 77.4 79.2 78.6 77.9 77.4 79.1 78.5 77.9 77.4 79.1 78.3 77.9 77.3 79.1 78.3 77.9 77.3 79.1 78.3 77.9 77.3 79 78.3 77.9 77.3 79 78.2 77.9 77.3

78.9 78.2 77.9 77.2 78.9 78.2 77.8 77.2 78.9 78.2 77.8 77.1 78.8 78.2 77.8 77.1 78.8

78.1

77.8

77.1

LeqLL210L9079.176.82506077.96078.0dB

77 77 77 77 77 77 76.9 76.9 76.9 76.8 76.8 76.7 76.7 76.7 76.7 76.4 76.4 76.1 76 75.7

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噪声污染管理方案

82.9 5，80.4 测79.7 数79.3 及79.2 理 79.1

79 79 78.8 78.7 78.7 78.6 78.6 78.6 78.5 78.5 78.5 78.5

78.4 77.9 78.4 77.9 78.4 77.9 78.3 77.9 78.3 77.8 78.3 77.8 78.2 77.8 78.1 77.8 78.1 77.8 78.1 77.8 78.1 77.8 78.1 77.8 78.1 77.7 78 77.7 78 77.7 78 77.7 78 77.7 78

77.7

77.5 76.9 77.5 76.8 77.4 76.8 77.4 76.8 77.4 76.8 77.3 76.8 77.3 76.7 77.3 76.7 77.2 76.6 77.2 76.6 77.2 76.6 77.2 76.6 77.2 76.5 77.2 76.5 77.2 76.5 77 76.4 76.9 76.3 76.9

76.2

监点5据处

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噪声污染管理方案

78.4 77.9 77.7 76.9 75.6 78.4 80.5 77.978.9 77.678.4 76.978.1 75.277.3 80.2 78.9 78.3 78 77.2 79.7

78.8

78.3

78

77.2

L22LeqL10L90506077.878.776.66077.9dB

6，监测点6数据及处理

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噪声污染管理方案

79.5 78.8 78.3 77.9 38.7 79.563.8

65.6 78.866.1 66.6 78.3

66.8

67.1 77.9 67.4 79.4 78.8 78.2 77.8

79.4 78.8 78.2 77.8 79.3 78.7 78.2 77.8 79.3 78.7 78.2 77.7 79.3 78.7 78.2 77.7 79.3 78.7 78.2 77.7 79.2 78.7 78.2 77.7 79.1 78.7 78.2 77.7 79.1 78.7 78.2 77.6 79.1 78.6 78.2 77.6 79 78.6 78.1 77.6 79 78.6 78.1 77.5 79 78.4 78.1 77.4 79 78.4 78.1 77.3 78.9

78.4

78.1

77.3

LeqLLL22109079.3506078.276.66078.3dB

7，监测点7数据及处理

77.1

67.8 77

69.1 76.9 76.9 76.8 76.7 76.7 76.6 76.6 76.5 76.4 76.3 76.3 76.3 76.1 76.1 76.1

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噪声污染管理方案

61.4 63.8 65.6 66.1 66.6 66.9 67.1 67.4 67.8 69.1

63.9 65.7 66.6 66.9 67.1 67.4 67.9 69.4 61.4 50.5 56.6 57.3 66.2 58.1 58.6 58.9 59.4 60.3 61.6 .3

61.5 .0 65.8 66.2 66.7 66.9 67.1 67.4 68.0 69.4 61.6 .1 65.8 66.3 66.7 66.9 67.1

67.5

68.0

69.5

61.6 .1 65.8 66.3 66.7 66.9 67.2 67.5 68.0 69.8 61.6 .1 65.9 66.3 66.7 66.9 67.2 67.5

68.1

69.8

61.9 .5 65.9 66.3 66.7 66.9 67.2 61.9 .5 66.0 66.4 66.7 66.9 67.2 62.3 .7 66.0 66.4 66.7 67.0 67.2 62.3 .8 66.0 66.4 66.7 67.0 67.2 62.4 .9 66.0 66.4 66.7 67.0 67.3 62.8 65.0 66.0 66.4 66.7 67.0 67.3 62.8 65.1 66.0 66.4 66.8 67.0 67.3 63.1 65.1 66.0 66.5 66.8 67.0 67.3 63.3 65.2 66.1 66.5 66.8 67.0 67.3 63.5 65.3 66.1 66.5 66.8 67.0 67.3 63.6 65.4 66.1 66.5 66.8 67.1 67.4 63.6 65.5 66.1 66.5 66.8 67.1 67.4 63.6 65.5 66.1 66.6 66.8 67.1 67.4

LeqL2L20L18063.321006066.869.16067.4dB

8，监测点8数据及处理

67.5 68.3 67.5 68.4 67.5 68.5 67.5 68.5 67.5 68.5 67.5 68.6 67.5 68.7 67.6 68.7 67.6 68.7 67.7 68.9 67.7 68.9 67.8 68.9 67.8

68.9

69.9 69.9 70.0 70.0 70.2 70.3 70.5 70.5 70.7 72.7 73.0 73.1 73.9

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噪声污染管理方案

54.2 56.6 57.5 58.1 58.6 58.9 59.4 60.4 61.7 .5 54.3 56.6 57.5 58.1 58.6 59.0 59.4 60.4 61.7 .6 54.9 56.6 57.5 58.2 58.6 59.0 59.5 60.5 61.9 .8 55.5 56.6 57.5 58.2 58.7 59.0 59.6 60.6 61.9 65.2 55.7 56.7 57.6 58.2 58.7 59.1 59.7 60.6 62.0 65.8 55.9 56.7 57.6 58.2 58.7 59.1 59.7 60.6 62.2 66.3 56.0 56.8 57.6 58.3 58.7 59.1 59.7 56.0 56.9 57.7 58.3 58.7 59.1 59.8 56.1 56.9 57.7 58.4 58.7 59.2 59.8 56.3 56.9 57.8 58.4 58.8 59.2 59.8 56.3 57.0 57.8 58.4 58.8 59.2 60.0 56.4 57.0 57.9 58.4 58.8 59.2 60.0 56.4 57.0 57.9 58.4 58.8 59.2 60.0 56.4 57.1 57.9 58.4 58.8 59.2 60.1 56.5 57.1 57.9 58.5 58.9 59.3 60.2 56.5 57.2 58.0 58.5 58.9 59.3 60.2 56.5 57.2 58.1 58.5 58.9 59.3 60.2 56.5 57.3 58.1 58.5 58.9 59.4 60.2 56.6 57.3 58.1 58.6 58.9 59.4 60.2 LeqLL220L180.356.621006058.96059.9dB60.6 62.2 60.7 62.2 60.8 62.3 60.8 62.4 60.8 62.7 60.9 62.7 61.0 62.8 61.2 63.2 61.3 63.3 61.4 63.4 61.5 63.5 61.5 63.6 61.5 63.8 66.9 67.1 67.2 67.2 68.2 68.2 68.3 68.5 68.5 69.6 69.7 69.9 73.6 页脚内容

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噪声污染管理方案

9，监测点9数据及处理

52.4 58.6 59.2 59.7

60.1

60.6

61.0 52.4 58.7 59.2 59.8 60.2 60.6 61.1 52.4 58.7 59.3 59.8 60.2 60.6 61.1 52.8 58.7 59.3 59.8 60.2 60.6 61.1 55.9 58.8 59.3 59.8 60.3 60.7 61.2 57.0 58.8 59.3 59.8 60.3 60.7 61.2 57.0 58.8 59.3 59.8 60.3 60.7 61.2 57.0 58.8 59.3 59.8 60.3 60.7 61.2 57.5 58.9 59.3 59.9 60.3 60.7 61.2 57.6 58.9 59.3 59.9 60.4 60.7 61.3 57.8 58.9 59.4 59.9 60.4 60.7 61.3 58.0 58.9 59.5 59.9 60.4 60.7

61.5

58.1 58.9 59.5 60.0 60.4 60.8 61.5 58.2 58.9 59.5 60.0 60.5 60.8 61.5 58.2 59.0 59.6 60.0 60.5 60.9 61.5 58.3 59.0 59.6 60.0 60.5 60.9 61.6 58.3 59.1 59.7 60.0 60.5 60.9 61.6 58.4 59.1 59.7 60.1 60.5 60.9 61.6 58.4 59.1 59.7 60.1 60.5 61.0 61.7 58.6 59.1 59.7

60.1

60.5

61.0

61.7

L22LeqL20L180.1006060.5158.66061.0dB

61.7 62.6 61.7 62.6 61.7 62.6 61.8 62.6 61.8 62.7 61.8 62.7 61.9 62.7 61.9 62.7 61.9 62.8 61.9 62.9 62.0 63.1 62.1 63.1 62.2 63.3 62.3 63.3 62.3 63.4 62.3 63.7 62.3 63.7 62.4 63.8 62.5 63.8 62.6

.0

.1 .1 .1 65.3 65.4 65.6 65.6 65.7 65.8 66.0 66.1 66.5 66.6 66.7 66.7 66.9 67.1 67.3 67.9 68.1

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噪声污染管理方案

10，监测点10数据及处理

52.8 54.4 55.3 55.8 56.2 56.4 56.7 57.0 57.4 58.2 52.9 54.5 55.3 55.8 56.2 56.5 56.7 57.0 57.5 58.3 53.1 54.5 55.4 55.8 56.2 56.5 56.7 57.0 57.6 58.3 53.2 54.6 55.4 55.9 56.2 56.5 56.8 53.3 54.7 55.4 55.9 56.3 56.5 56.8 53.7 54.8 55.5 55.9 56.3 56.5 56.8 53.7 54.8 55.5 55.9 56.3 56.5 56.8 53.8 54.8 55.5 55.9 56.3 56.5 56.9 53.9 54.8 55.5 56.0 56.3 56.5 56.9 53.9 54.8 55.5 56.0 56.3 56.5 56.9 54.0 54.9 55.5 56.0 56.3 56.6 56.9 54.0 55.0 55.6 56.0 56.3 56.6 56.9 54.0 55.0 55.6 56.0 56.3 56.6 56.9 54.1 55.1 55.6 56.0 56.3 56.6 56.9 54.2 55.1 55.6 56.0 56.4 56.6 56.9 54.3 55.2 55.7 56.0 56.4 56.6 56.9 54.3 55.2 55.7 56.1 56.4 56.6 56.9 54.4 55.2 55.7 56.1 56.4 56.6 56.9 54.4 55.3 55.8 56.1 56.4 56.6 57.0 54.4 55.3 55.8 56.1 56.4 56.7 57.0

LeqLLL222018058.2541006056.4.46056.6dB

57.0 57.6 57.0 57.6 57.1 57.7 57.1 57.7 57.2 57.7 57.3 57.7 57.3 57.7 57.3 57.7 57.3 57.7 57.4 57.7 57.4 57.9 57.4 57.9 57.4 58.0 57.4 58.0 57.4 58.0 57.4 58.1 57.4 58.2 58.4 58.4 58.4 58.4 58.5 58.7 58.8 58.9 59.0 59.1 59.1 59.2 59.5 59.8 60.2 60.2 62.0 页脚内容

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噪声污染管理方案

11，监测点11数据及处理

45.6 48.0 49.0 49.9 50.7 51.5 52.1 52.9 53.8 54.8 45.6 48.1 49.0 49.9 50.7 51.5 52.1 52.9 53.9 54.9 46.0 48.1 46.2 48.1 46.3 48.1 46.6 48.2 46.6 48.2 46.6 48.2 46.8 48.2 47.2 48.3 47.3 48.3 47.5 48.5 47.5 48.6 47.8 48.6 47.8 48.6 47.9 48.6 47.9 48.7 47.9 48.8 47.9 48.8 48.0 48.9 49.1 50.0 49.1 50.1 49.2 50.1 49.2 50.3 49.2 50.3 49.3 50.3 49.3 50.4 49.6 50.4 49.6 50.4 49.7 50.4 49.7 50.5 49.8 50.5 49.8 50.5 49.8 50.5 49.8 50.6 49.8 50.6 49.9 50.6 49.9 50.7 50.8 51.7 50.8 51.7 50.8 51.7 50.8 51.8 50.9 51.8 50.9 51.8 50.9 51.8 50.9 51.8 51.0 51.8 51.0 51.8 51.1 51.8 51.1 51.8 51.1 51.9 51.1 51.9 51.3 51.9 51.4 51.9 51.4 52.0 51.5 52.0 52.1 53.0 52.1 53.0 52.1 53.0 52.2 53.1 52.2 53.2 52.3 53.3 52.3 53.3 52.4 53.4 52.4 53.4 52.4 53.5 52.4 53.5 52.5 53.5 52.5 53.6 52.7 53.7 52.7 53.7 52.8 53.7 52.8 53.7 52.8 53.8 54.0 55.0 54.0 55.1 54.0 55.1 54.1 55.3 54.1 55.3 54.1 55.7 54.1 55.7 54.2 56.3 54.2 56.6 54.2 56.6 54.3 56.6 54.3 56.8 54.4 57.2 54.6 57.4 54.6 57.8 54.6 58.3 54.6 63.4 54.7 75.9 页脚内容

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噪声污染管理方案

LL2LeqL2018054.848.021006051.56052.3dB

12，监测点12数据及处理

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噪声污染管理方案

33.0 35.4 37.0 38.0 38.7 39.3 40.0 41.3 44.1 48.3 33.3 35.5 37.1 38.0 38.7 39.4 40.1 41.4 44.2 48.7 33.5 35.5 37.2 38.1 38.7 39.4 40.1 41.7 44.2 48.8 33.5 35.5 37.2 38.1 38.7 39.4 40.2 41.7 44.3 49.1 33.8 35.7 37.2 38.1 38.8 39.4 40.3 34.2 35.7 37.2 38.2 38.8 39.5 40.3 34.4 35.7 37.3 38.3 38.9 39.5 40.3 34.8 35.7 37.4 38.3 39.0 39.6 40.3 34.8 35.7 37.4 38.3 39.0 39.6 40.3 34.8 35.8 37.4 38.3 39.0 39.6 40.4 34.9 35.9 37.4 38.4 39.0 39.6 40.5 34.9 36.2 37.5 38.5 39.0 39.6 40.5 34.9 36.5 37.7 38.5 39.0 39.6 40.6 35.0 36.5 37.7 38.5 39.0 39.7 40.6 35.0 36.5 37.7 38.6 39.1 39.7 40.7 35.0 36.6 37.8 38.6 39.1 39.7 40.7 35.1 36.6 37.8 38.6 39.1 39.8 40.8 35.2 36.7 37.8 38.6 39.3 39.8 40.8 35.3 36.9 37.9 38.7 39.3 39.8 41.0 35.3 36.9 37.9 38.7 39.3 39.9 41.3

LeqLL220L21001806039.348.335.36042.1dB

41.7 44.3 41.7 44.4 41.8 44.5 42.2 44.7 42.2 45.0 42.4 45.2 42.6 45.4 42.6 45.5 42.9 45.7 42.9 46.2 43.2 46.3 43.4 46.5 43.5 46.8 43.5 47.4 43.8 47.8 43.8 48.3 50.0 50.2 50.6 50.6 50.6 51.7 52.0 52.5 52.6 53.0 53.1 53.5 53.7 54.1 54.2 57.8 页脚内容

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13，监测点13数据及处理 90.5 79.8 90.2 79.7 90.1 79.6 .5 79.6 .2 79.6 88.6 79.5 87.5 79.5 85.3 79.5 80.6 79.5 80.6 79.4 80.5 79.3 80.5 79.3 80.5 79.2 80.3 79.2 80.2 79.1 80.2 78.9 80.1 78.9 80.1 78.9 80.1 78.9

79.8

78.9

78.9 78.5 78.8 78.5 78.8 78.5 78.8 78.5 78.7 78.4 78.7 78.4 78.6 78.4 78.6 78.3 78.6 78.3 78.6 78.2 78.6 78.2 78.6 78.2 78.6 78.2 78.6 78.2 78.6 78.2 78.6 78.1 78.6 77.9 78.5 77.8 78.5 77.8 78.5

77.8

77.8 77.6 77.6 77.6 77.6 77.6 77.6 77.5 77.5 77.4 77.4 77.2 76.9 76.7 76.6 76.5 76.5 76.5 76.5 76.3

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噪声污染管理方案

2L10L90280.677.4LeqL506078.6

14，监测点14数据及处理

78.6 80.2 76.2 79.9 86.3 79.9 86.2 79.8 85.6 79.8 85.5 79.8 85.3 79.7 85.2 79.6 85.2 79.6 85.2 79.6 84.5 79.6 84.3 79.6 84.2 79.6 84.2 79.5 82.2 79.5 80.6 79.5 80.6 79.5 80.5 79.5 80.4 79.5 80.2

79.4

6078.8dB

79.4 78.579.2 78.479.2 78.478.9 78.478.9 78.478.9 78.478.6 78.378.6 78.278.6 78.278.6 78.278.6 78.1 78.6 76.578.6 76.578.5 76.578.5 76.578.5 76.578.5 76.478.5 76.378.5 76.378.5

76.276.2 76.2 76.2 76.2 76.1 75.6 75.6 75.5 75.5 75.4 75.3 75.2 75.2 75.2 74.5 74.5 74.2 72.5 70.6 70.5

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噪声污染管理方案

2L10L90285.275.3LeqL506078.6

15，监测点15数据及处理

86.2 79.8 85.6 79.8 85.3 79.8 85.2 79.8 84.6 79.8 80.6 79.8 80.5 79.8 80.5 79.8 80.5 79.8 80.2 79.6 79.8 79.6 79.8 79.6 79.8 79.6 79.8 79.6 79.8 79.6 79.8 79.6 79.8 79.5 79.8

79.5

6080.2dB

79.5 78.7 79.5 78.7 79.5 78.7 79.5 78.679.5 78.679.4 78.679.4 78.679.4 78.679.2 78.678.9 78.678.9 78.678.9 78.578.9 78.578.9 78.578.8 78.578.8 78.578.8 78.578.8

78.478.4 78.3 78.3 78.2 78.2 78.2 78.2 78.2 77.7 77.6 77.6 77.5 77.5 75.6 75.5 75.4 74.9 74.8

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噪声污染管理方案

79.8 79.8

79.5 79.5

78.7 78.7

78.4 78.4

74.6 74.5

2L10L90280.277.6LeqL506078.9

16，监测点16数据及处理

.5 79.6 .2 79.6 88.6 79.6 87.5 79.6 85.3 79.6 85.3 79.6 85.2 79.6 85.2 79.6 85.2 79.6 80.2 79.6 79.8 79.6 79.8 79.6 79.8 79.5 79.8

79.5

6078.3dB

78.9 78.5 78.9 78.5 78.8 78.5 78.8 78.5 78.8 78.5 78.8 78.5 78.8 78.5 78.8 78.4 78.7 78.4 78.7 78.4 78.6 78.4 78.6 78.3 78.6 78.3 78.6

78.2

77.6 77.6 77.6 77.6 77.6 77.5 77.5 77.5 77.5 77.5 77.3 75.6 75.6 75.5

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噪声污染管理方案

79.8 79.5 78.6 78.2 79.8 79.5 78.6 78.2 79.8 79.5 78.6 77.8 79.8 78.9 78.6 77.6 79.7 78.9 78.5 77.6 79.6

78.9

78.5

77.6

LeqLL2L10905078.780.277.32606078.8dB

五、降噪方案设计

75.5 75.5 75.4 75.4 74.9 74.8

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噪声污染管理方案

1，厂房噪声评价

《工业企业噪声卫生标准（实行草案）》规定：对于新建、扩建、改建的工业企业的生产车间和作业场所的工作地点噪声级最大为85dB,对于现有企业经过努力，暂时达不到标准的，其噪声允许值可取90dB。

根据现场监测，机电系实训基地噪声均不超标，但为了达到实训目的，锻炼设计能力，将噪声标准设置为75dB,以图中一、二区域为例进行降噪设计。

2，厂房规模及噪声现状

一、二区整体尺寸为61.0m×10.0m×5.5m，车间工作时，实测平均噪声级

为77.478.279.578.077.978.378.2dB(A)，由于车间墙壁均为坚硬反

6射面，室内房间平均吸声系数较小，且声源较分散，所以采用吸声处理方式进行降噪。

3，吸声降噪设计

根据《噪声污染控制技术》50页“表3-1 A计权网络频率响应特性的修正值”将所测噪声A升级转化为不同倍频程下的声级列入表1序号1内。吸声处理前壁面吸声系数列于序号4.降噪目标采用NR70曲线，根据NR70曲线将各倍频程标准量及降噪量列于序号2、3内，根据公式LP2 计算出各倍频程处理后应1有平均吸声系数2，并列于表序号5内。设计采用悬挂吸声板的处理方法降低噪声。吸声板构造为双层，各铺5cm厚超细玻璃棉，中间使用一层再生布分开，外包塑料纱窗，用尼龙线缝制成形。

由计算得内表面积S=2001m2吸声处理后平均吸声系数为0.798，假设悬挂吸声板的面积为S1,则有：

211.5S1S因此有S1S(21)971m2

1.5实际做时，S1取980m2

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噪声污染管理方案

表1

序项目 号 1 2 3 4 5

吸声处理前声压级/dB 噪声控制指标NR70 所需降噪量/dB 处理前壁面平均吸声系数1 125 62.1 83.0 --- --- 各倍频程中心频率/Hz 250 69.6 78.0 --- --- --- 500 75.0 73.0 2.0 0.03 0.06 1000 2000 78.2 79.4 78.2 68.0 --- --- --- 11.4 0.05 0.57 4000 79.2 67.0 11.2 0.07 0.798 A声级/dB 78.2 75.0 --- --- --- 处理后应有平均吸声系数2 ---

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噪声污染管理方案

六、参考文献

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