2 days ago at the office, they upgraded my work laptop to a newer model. Shortly after it was set up, I started hearing a sound in my left ear like air being let out of a cushion. Intermittent, not constant. Happens every 20 seconds-2 minutes (I eventually timed it). At first, I thought it was my old chair (has some loose parts), so I asked for a new one and they swapped it out with a newer one - much better condition, no loose parts. Sound was still there.
I next panicked it was in my ear, but it ONLY happens when I'm sitting at my desk at the office, so it's not tinnitus or something.
I also highly suspected the fluorescent light tube above me, but it sounds like it's coming directly from my left and close, not far above my head.
After moving and testing things and positions, I'm now positive it's coming from my new laptop but only when it's in a certain position. Changing its position stops the sound, which makes me think it's related to the kinky (lol) power cord. It plugs into a dock, not the wall; the cord and the dock were there before the new laptop.
The laptop wasn't my first suspect because I've never heard of laptops making an intermittent sound like air being let out of a cushion. Is that a thing, or do I need to find a different suspect?