|
关注：1
2013-05-23 12:21
求翻译：it measures acoustic pression level for the quantification of different kinds of noise, especially for industrial. The unit is decibel (dB), corresponding to the decimal logarithm of the ratio of 2 powers. In the following picture, you can find level in dB of classical noises.是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
it measures acoustic pression level for the quantification of different kinds of noise, especially for industrial. The unit is decibel (dB), corresponding to the decimal logarithm of the ratio of 2 powers. In the following picture, you can find level in dB of classical noises.
问题补充： |
湖北省互联网违法和不良信息举报平台 | 网上有害信息举报专区 | 电信诈骗举报专区 | 涉历史虚无主义有害信息举报专区 | 涉企侵权举报专区
