ys0810
第6楼2011/04/06
poorlittle
第7楼2011/04/06
Is this related to the concept of dB?
= = = = = =
Since S/N ratio is generally expressed in dB and “……对于功率,dB = 10*lg(A/B)。对于电压或电流,dB = 20*lg(A/B)。…… (from http://baike.baidu.com/view/53484.htm)” , I therefore have the above guess. Just a guess, no scientific ground.
Withdrawn