Sump pump getting louder? PIC attached

[Mark F.]

Hello BP,

I've noticed my sump pump is getting louder lately. I'm unfamiliar with maintenance on these as I didn't have them where I lived. I've never seen a set up like mine, it has what appears to be a pump then it runs to where I can't see anything. Any advice on how to access the area (not sure its even behind this wall) and how to quiet it or conduct maintenance. Thanks!

[Christpher Schuebel]

Unless I'm missing something what your showing in your pictures isn't a sump pump.  It's a water meter.