In fact moles don't hibernate nor do worms. The moles follow worms deep into the ground as both try to avoid freezing. Winter damage by moles usually occurs during unseasonably warm periods or beneath the insulation of heavy snow. Moles can't hibernate because they don't store food or fat. Many old tales deal with when moles are active.
Moles generally are timid animals, easily alerted or frightened by unfamiliar noises.
Methodical or constant noises don't seem to bother them. I have paid exclusive attention to mole behavior for many years now and when asked the above question on activity I feel comfortable with the answer, moles are usually active when and where the surroundings are quietest. I have seen them sit motionless in a tunnel for more than twenty minutes when they have been disturbed or frightened. I hear this a lot. I usually retort that I have golf clubs but can't play golf.