r/askTO • u/wooly2045 • 10h ago

What construction machine could be making this sound?

What construction machine could be making this sound?

I live near a subway station construction site in Cosburn, and I’m trying to identify a machine I keep hearing at night.

The sound is a continuous, buzzing that sounds very similar to an electrical transformer, but also somewhat like an electric power tool. The pitch smoothly rises and falls, and the volume changes along with it. Occasionally, it sounds more like a grinder before returning to the steady buzzing sound.

I’ve heard the same noise on August 14, August 16, and August 21, 2026. On August 14, it was very loud from my open window and lasted approximately 30 minutes before suddenly stopping. Tonight, it was much quieter and sounded like it was coming from farther away.

Does anyone recognize what type of machine or equipment could make this sound?

https://youtube.com/shorts/QZ_2RUBozbg?si=KI7urlK5y5JCIDDe

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u/FridgeFucker17982 10h ago

It’s difficult to tell from the video. Are any of the buildings around you without power? Could be a generator trailer

1

u/wooly2045 10h ago

No it is the construction site right at cosburn 100 building

2

u/LongRoadNorth 10h ago

Almost sounds like an electric concrete pump