I've seen other reports of this here in the past (although possibly in a different part of the City?), and yesterday I heard it, too, from the area somewhere east of Cambridge Hospital; maybe somewhere along Hampshire St. I was aware of it from inside my house, with open windows, and it about drove me mad. It lasted for about 30 minutes, and I experienced physical, mental, and emotional relief when it stopped.

My impression was that it was coming from one of the neighborhoods just south of Inman Square, or perhaps in Inman Square itself.

Please look into this!

Thank you.

I live in the Hampshire/Beacon-Cambridge street wedge and could also hear this hum this week. On Monday, 8/24, I heard it around 7 AM, but then it went away after 7:30 AM. It almost sounded like someone's clock alarm. I also heard the hum on Tuesday, 8/25 and Wednesday, 8/25. You could hear it in the morning and the evening. This morning, Thursday, August 27, I have not heard it yet. As a musician's reference, the pitch of the hum hovers around A flat above middle C.

Thanks so much for confirming the hum. It's reassuring to know others have heard it as well.

This noise is coming from the CRLS school. There have been comments on recent posts regarding it. See:
https://seeclickfix.com/web_portal/WacEfzPx7m29dubrPfXEEwCV/issues/8431163
https://seeclickfix.com/web_portal/WacEfzPx7m29dubrPfXEEwCV/issues/8433337
https://seeclickfix.com/web_portal/WacEfzPx7m29dubrPfXEEwCV/issues/8458357

But there does not seem to be any clear resolution to it. One of the posts expected it to continue through the first few weeks of Sept.

Thanks so much for this information. It's for an important purpose. It makes a difference knowing what the source is.

I am not in agreement that this is definitively coming from CRLS. I am east of the school and can hear it from an area east of me.

It may be more widespread than thought, or possibly be echoing/deflecting off of structures in any number of directions.

Are we talking about two different noise-pollution events? I am hearing a very high-pitched whine; not something I'd categorize as a hum.

Regardless, it - or they - needs looking into.

Issue 8476519 has been marked as a duplicate of this issue.

Issue 8472263 has been marked as a duplicate of this issue.

City Hall – DR assigned this issue to License Commission

This is the HVAC system in the war memorial building. It exceeds 100 dbs.
It is due to the failure of the city to maintain the system. I have been told that it should be fixed by Sept 4th. I hope it is. This has been going on for almost 10 years and has gotten progressively worse.

Good Evening,
Vedad Konjic the Director of Facilities Cambridge Public Schools, informed me that 4 of the boilers at the War Memorial were shut off. Please comment, via this site, if you have noticed a difference. Thank you, Andrea Boyer (License Commission).

Thank you for your info, Joseph. I'll check the posts you listed. I'm not an expert in environmental acoustics, so for all I know, the sound could very well be coming from CRLS.

Hi
The sound is definitely better. I assumed that they had shut off the boilers.
I did hear one of the sounds this am coming from the building. But at a much lower sound level.
The problem is... it does not fix the problem.
Historically when I have complained the boiler making the noise was shut off not serviced.
There are five boilers. Eventually it will get cold and they will have to be turned on. If they have not been properly serviced the increasingly loud noise will be back.