So it's starting to get warm out and i decided to turn on my A/C after not using it for a long while. When i turned it on, i heard a chirping noise for about 3-4 seconds before it stopped. As i put my car into reverse to back out of my driveway, the chirping kicked back up until i came out of reverse and took off in 1st. I'm not hearing it when I'm driving except for a split second every once in a while during cruising. I'm not too experienced when it comes to belts and the A/C system, so i figured i'd ask to see if anyone has any idea what the cause of this is or has experienced this themselves?