Any Thoughts On Where Noise Is Coming From

[steamship]

I've had an unusual whining noise from my car, but only under normal acceleration. Depending on the road noise, it can be heard from speeds of 30 to 70mph (it sounds like it's coming from the transmission tunnel which is why I put it here). It's been there ever since I bought the car four years ago and finally decided to try and capture the sound.

I've uploaded a video clip to YouTube, if you want to listen to it. The link is as follows:

https://youtu.be/f1dh6RcGf5Y

You can hear it best around the 20-30 second mark, and see when I'm accelerating.

I don't know if this has anything to do with it, but I just discovered that one of my intake manifold actuators isn't working properly. Looking from the front of the car, it's the one on the left. I just happened to see another video on YouTube of how these work, and since I was using my GoPro today, I thought I'd capture these as well. They both deflate when the ignition is turned on, but only the right one inflates when you rev the engine. Both inflate again when engine stopped.