help 4 some data of in-ear headphone

[protozoon]

hi,everyone here,i am a freshman about in-ear headphone,but i like it so much.but now, i have some problem concern effect of noise-reduce of in-ear headphone. i've got some data but not many.
please help me to add the data of noise-reduce u knows!
thanks a lot!

UM1----25DB
E6I-----30to35DB
ER4P--------33DB，41DB（foam eartips）
SF3---------16DB


thanx again.