Great point nwmtnbkr, my cyclone makes less noise than the the motor in that first vid. I can't go 45mph like it does but I'm perfectly content with max speed of 30mph. The second vid sounds just like my cyclone on startup but I don't get that high pitched whine when I reach higher speeds, that would drive me crazy since I am sensitive to specific frequencies. You are correct when you say that the sound of the wind drives out the sound of the motor, most of the time when I'm riding I don't even notice the motor. That can be a bad thing too since I don't have my cyclometer mounted up yet and can only gauge my motor rpm by sound