How to make sounds play at different volumes based on hit velocity?

I'm trying to make it so if someones walking on a Mat it plays at a regular volume, but if they fall on the mat from say 10 studs high it makes the noise louder or plays a different sound if the previous option is not possible.

SomePart.Touched:Connect(function(part)
    if part.Velocity.Magnitude > 10 then -- put number 
        part.Sound.Volume = 10 -- do whatever
        part.Sound:Play() -- put sound in part
    end
end)