Hearing this little Echo moaning sound

2007 Honda Civic- as soon as the car cranks up, if you sit there you can here a little echo sound coming from the front of the car. It sounds like a moaning, it goes away once you accelerate.

When I crank my car, I have noticed that I am hearing this little echo/moaning sound. If you sit there you can hear it, but no one can hear it but me. Since I drive the car everyday I know something is wrong. It just started happening, but I also noticed that I can hear fluids swishing around in there, and that's never been before, but this is awkward. It just this roar/moaning coming from the front. Do you know what it could be. I took it to Honda, and they don't see anything.