I am using Logitech's USB mic for voice control:
http://www.logitech.com/index.cfm/pr...CONTENTID=6776

The recognition at medium speeds (<50 MPH) is almost 100%, then quickly decays and reaches 0% at 75 MPH. What do you guys do to deal with the extra noise ? Are there any good circuits or software to filter out the wheel noise and improve the signal / noise ratio seen by the speech software?