There was another ticket on this topic with a message from the City. There's apparently equipment being services/replaced in a sequence, and once everything has been replaced, the noise will abate. I have no connection with this, other than living nearby, and having seen another response from Cambridge.

City Hall – DR assigned this issue to License Commission

I heard it also today and am disappointed that this continues. There's no way to get away from the noise and it must stop.

This is the latest update that I received from MIT on Friday:
-Winchester is scheduling a crane for next week to remove 4 compressors and install the last two new ones.
-They are currently working on possible alternatives to a sound attenuator.

Also, I emailed MIT yesterday to let them know that there are additional complainants.

If you have any further questions or comments and have not done so already, please email me directly at aboyer@cambridgema.gov Thank you.