221–230 of 344 posts
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I don't think SF residents are as thrilled. It's overwhelmingly loud.
I imagine it’s just going to be ignored. Like the bart “screeching” they never fixed.
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What's resonating? If the slats themselves are resonating, spacing them differently won't help much. Then again, if it is the slats would a horizontal brace running along the middle of the slats dampen or eliminate the resonance? | | | ------------- | | |
Dampers are probably only solution that doesn't involve rebuilding it. I haven't seen a great photo, but one of the videos seems to show the rails are square tubing...so could be vortex shedding? Running a brace might not be a bad idea, but i could imagine that it might just double the octave, and make it a bit quieter
I'm just glad they identified the source of the hum, many people are impacted for years by unexplainable sounds, and it is maddening. It took me and my neighbours a month to find the source of a hum that was resonating with our windows. It was torture, with midnight walks and lurking around potential sources, mapping nearby industrial sites, and questioning our sanity, while our windows were vibrating without a stop.…
Two unrelated anecdotes: 1. A few years ago I spent some time in Falmouth, MA and there was an ongoing battle over newly installed wind turbines. The humming sound was getting to people, including to the point where they were getting headaches. Some people heard it and others didn't. The locals were going to war with the initiative. This article reminded me of that and I checked in on the ordeal. Looks like they shut…
Earlier quoted context omitted.
I imagine it’s just going to be ignored. Like the bart “screeching” they never fixed.
That's amazing. According to this article, bart is now moving to tapered wheels instead of plain cylindrical: https://sf.curbed.com/2018/6/11/17449460/bart-screen-convers... My understanding was that all rail systems since roughly forever use tapered wheels. Primarily to reduce wear, by having the tapered wheels self center instead of grinding against the track. It's really odd that they seem to just roll that out in…
I'm just glad they identified the source of the hum, many people are impacted for years by unexplainable sounds, and it is maddening. It took me and my neighbours a month to find the source of a hum that was resonating with our windows. It was torture, with midnight walks and lurking around potential sources, mapping nearby industrial sites, and questioning our sanity, while our windows were vibrating without a stop.…
My backyard backs in to a strip mall with an auto mechanic shop. We hear a high pitch sound some times of the day and when we step outside to inspect, we only hear a different sound from the shop behind - a typical machine running, but not necessarily unpleasant. Turns out the walls are able to mask the lower pitch sound somehow and let in only the unpleasant higher pitch sound to the inside of the house. I am not su…
Could also be electronic noise. I wonder what the machine is.
Earlier quoted context omitted.
Two unrelated anecdotes: 1. A few years ago I spent some time in Falmouth, MA and there was an ongoing battle over newly installed wind turbines. The humming sound was getting to people, including to the point where they were getting headaches. Some people heard it and others didn't. The locals were going to war with the initiative. This article reminded me of that and I checked in on the ordeal. Looks like they shut…
1. Very funny to be reading this. I grew up in Falmouth, and lived there until 2014 when I graduated highschool. I obviously wasn't incredibly attuned to this issue, but as I recall, the only people opposed to the installation of the turbines were a very small, very vocal, and very, very, wealthy minority of people who owned mind-bogglingly expensive beach houses and lived there two months out of the year. I'm fairly…
I hope somebody has a chance to make high-quality samples/recordings before it's fixed. I doubt we'll get the chance to hear an instrument like this again, accidental or not.
> before it's fixed Given that it was intentional, what makes you think it'll be "fixed"?
I'm just glad they identified the source of the hum, many people are impacted for years by unexplainable sounds, and it is maddening. It took me and my neighbours a month to find the source of a hum that was resonating with our windows. It was torture, with midnight walks and lurking around potential sources, mapping nearby industrial sites, and questioning our sanity, while our windows were vibrating without a stop.…
Earlier quoted context omitted.
What's resonating? If the slats themselves are resonating, spacing them differently won't help much. Then again, if it is the slats would a horizontal brace running along the middle of the slats dampen or eliminate the resonance? | | | ------------- | | |
Dampers are probably only solution that doesn't involve rebuilding it. I haven't seen a great photo, but one of the videos seems to show the rails are square tubing...so could be vortex shedding? Running a brace might not be a bad idea, but i could imagine that it might just double the octave, and make it a bit quieter