Rss & SiteMap
声学楼论坛 http://www.nju520.com/bbs/
| 下载信息 [文件大小: 下载次数: ] | |
点击浏览该文件:模拟节目信号功率谱.doc |
模拟节目信号功率谱 (GB 9001-88) p48
|
频 率 (Hz) |
相对电平 (dB) |
容差极限(dB) |
频 率 (Hz) |
相对电平 (dB) |
容差极限(dB) | ||
|
+ |
— |
+ |
— | ||||
|
20 |
-13.5 |
3.0 |
3.0 |
630 |
0 |
0.5 |
0.5 |
|
25 |
-10.2 |
2.0 |
2.0 |
800 |
0 |
0.5 |
0.5 |
|
31.5 |
-7.4 |
1.0 |
1.0 |
1000 |
-0.1 |
0.6 |
0.6 |
|
40 |
-5.2 |
1.0 |
1.0 |
1250 |
-0.3 |
0.7 |
0.7 |
|
50 |
-3.5 |
1.0 |
1.0 |
1600 |
-0.6 |
0.8 |
0.8 |
|
63 |
-2.3 |
1.0 |
1.0 |
2000 |
-1.0 |
1.0 |
1.0 |
|
80 |
-1.4 |
1.0 |
1.0 |
2500 |
-1.6 |
1.0 |
1.0 |
|
100 |
-0.9 |
0.8 |
0.8 |
3150 |
-2.5 |
1.0 |
1.0 |
|
125 |
-0.5 |
0.6 |
0.6 |
4000 |
-3.7 |
1.0 |
1.0 |
|
160 |
-0.2 |
0.5 |
0.5 |
5000 |
-5.1 |
1.0 |
1.0 |
|
200 |
-0.1 |
0.5 |
0.5 |
6300 |
-7.0 |
1.0 |
1.0 |
|
250 |
0 |
0.5 |
0.5 |
8000 |
-9.4 |
1.0 |
1.0 |
|
315 |
0 |
0.5 |
0.5 |
10000 |
-11.9 |
1.0 |
1.0 |
|
400 |
0 |
0.5 |
0.5 |
12500 |
-14.8 |
1.5 |
1.5 |
|
500 |
0 |
0.5 |
0.5 |
16000 |
-18.2 |
2.0 |
2.0 |
|
630 |
0 |
0.5 |
0.5 |
20000 |
-21.6 |
3.0 |
3.0 |
顶