Rough 120mm CFM & DB Calculation?

[Leanin]

Can someone give me a better "estimated" calculation of what the CFM and DB numbers might be as they would apply to running a Panaflo 120mm at about 9 volts? I'm preparing to replace an 80mm blowhole (case top, centered) stock fan with the following specs:

Panaflo Fan Model: FBA12G12L
Nominal Speed: 1700 rpm
CFM: 68.9
Noise: 30 DB
Rated input: 2.16
Operating Voltage: 7-13.8

Reason for 9 voltage selection is that according to some web searches, this appears to be a stable but quiet run setting. Fan voltage controller gives option to crank up as needed.

[Leanin]

Looks like it would be in the 22DB range moving about 50 CFM extrapolating from below site and its excel data base:

http://www.silentpcreview.com/files/...s/fanspecs.xls

www.silentpcreview.com/article25-page1.html