頻段分別嚴格講要用1/3斜率..

也就是~100hz..125hz..160hz..200hz..250..315..400..500...

等差比大約是...1:1.25~1.28依序下去.

有點像鏡頭的光圈比值...1:1.4:2.8:4..等等.每段差1.4倍.每兩段差1.4x1.4=約2倍.

所以.上表標示出的.是較為減化頻段.給一般大眾我們好對照.也不用太學究..指教.