| Av | db |
| 1 | 0 |
| 1.414 | 3 |
| 2 | 6 |
| 3 | 9.5 |
| 4 | 12 |
| 5 | 14 |
| 6 | 15.5 |
| 7 | 17 |
| 8 | 18 |
| 9 | 19 |
| 10 | 20 |
| 100 | 40 |
| 1000 | 60 |
Av1*Av2=db1+db2
eg: 100db=40db+60db=100*1000=10 0000倍
80db=20db+60db=10*1000=10000倍
| Av | db |
| 1 | 0 |
| 1.414 | 3 |
| 2 | 6 |
| 3 | 9.5 |
| 4 | 12 |
| 5 | 14 |
| 6 | 15.5 |
| 7 | 17 |
| 8 | 18 |
| 9 | 19 |
| 10 | 20 |
| 100 | 40 |
| 1000 | 60 |
Av1*Av2=db1+db2
eg: 100db=40db+60db=100*1000=10 0000倍
80db=20db+60db=10*1000=10000倍
9812

被折叠的 条评论
为什么被折叠?