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Request for knowledge - Troubles at home

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lxmute:

--- Quote from: SL4P on June 05, 2022, 05:32:35 pm ---Maybe one of you should be talking to the local froggy municipal zoning authorities.

--- End quote ---

This is were another nightmare starts. If you saw that cartoon: https://www.imdb.com/title/tt0072901/?ref_=fn_al_tt_1
I've requested authorities, quite in vain. The different contacted services requesting you to contact another service, which leads you to a third one, which then tells you they are not qualified for it, an so on. Mayor, Senator, Deputy, Prefet doesn't give a F***. Grid distributor answers he is "not qualified" for measures.... The frequency agency sends you a contractor for High Frequency records when you expressly stated about low frequencies in your demand.

I can't even handle the idea to sell or find a renter for my building, because it's not healthy ATM, and moral to sell such a place with some hidden problem.
All those reasons makes I try to dig and study on my own, and end up requesting for help on a technical forum related to the Fairy Electricity.
I hold the bar  :-BROKE

btw I had last night weird patterns on the 20Hz-300Hz spectrum on the microphone:
--- End quote ---

CatalinaWOW:

--- Quote from: jonpaul on June 06, 2022, 06:26:49 am ---Rebonjour...

to SL4P: Zoning  enforcement depends on honest and uncorrupted  politicians (:-:)

In France, and Switzerland, outside of large cities, mixed zoning is common.

20 km from Paris are huge apartment developments constructed adjacent to small residential homes and and in open space areas.

Similar in Switzerland near Fribourg.


Jon

--- End quote ---

So now you have made all of your investigations pointless.  Even if you find something you believe that the politicians will let it continue.

You need to move, wear earplugs, wrap your house in tin foil or take some other defensive measure.  Trying the things you are willing to implement will be faster than the investigation.

lxmute:

--- Quote from: CatalinaWOW on June 06, 2022, 08:45:01 am ---wear earplugs,

--- End quote ---
done, I wear some Shure earplugs, listening to some conferences or "NRG8" musics collected on Youtube.


--- Quote from: CatalinaWOW on June 06, 2022, 08:45:01 am ---wrap your house in tin foil

--- End quote ---
Sure that some Farraday's cage (you still need the good frequency to select the correct mesh layout -> you need to monitor the correct patterns -> you need the good tool) + plates of cork between walls and the finishing touches would be good. But, the dude responsible for "the cause of the problem" has to pay for it.

As soon as I put a clear responsibility, it will end up at Courthouse, Sacrebleu! And there, oddly, there are dozens of lawyers ready to respond to the request.

EEVblog:

--- Quote from: lxmute on June 04, 2022, 07:53:33 am ---The main problem ends up being the privation of sleep on an enormous amount of nights, for 4 years. that's why I'm requesting tips. The other disturbances are somehow minor compared to this one.
I'm healthy and calm by the way, practicing Shotokan.

My goal is to be able to categorize the exact trouble. So either Vibro-acoustic, either Electrical leaks.
How could I monitor precisely 24/7 static electricity on a precise location ?
--- End quote ---

There is near zero chance that any electrical or "vibro-acoustic" problems are actually causing your sleep issues.

Start with getting a better pillow. Seriously. Then see a sleep specialist after talking with your doctor first.
Odds are there is an easy solution to your problem. A whole host of things can cause sleep issues, and the technical things you are looking into are practically last on the list.
But I'm afraid that you are now in a mindset where you have convinced yourself the problem is vibration/electrical related.

Fraser:
Likely of no help to the OP but two stories of noise nuisances that baffled residents of areas effected.

In Bristol, UK, there was a mysterious ‘hum’ that could be heard in the quiet hours that disturbed many peoples sleep. After much investigation it was discovered that the noise was coming from an aero engine manufacturers engine test bed. The test bed was bolted firmly to bedrock for stability and engine vibrations were transmitted into the bedrock, travelled many miles and re-emerged in an area of Bristol far away from the source. The vibrations came up from the bedrock under the houses. People were thinking the source was local to them, when in fact it was many miles away.

Another mystery noise that afflicted US residents was a loud humming noise that seemed to only occur at certain times and no local cause could be easily identified. After an investigation it was discovered that the noise was being created by fish in a harbour some distance away. The fish were using the hulls of boats to amplify their ‘calls’ buy pressing their bodies against the hulls. Weird but true.

Low frequency noise pollution can be very disturbing to anyone suffering from such. It can become a form of low level torture use as a dripping tap might if you can hear it, but cannot stop the noise being made. The brain can start to focus on the irritating stimulus to the point that sleep is affected and the noise becomes a serious problem to the person ‘hearing’ it. Note that noise does not have to be in the normal hearing range of a human to be detected by the body. This is especially true of low frequency noise where transmitted vibrations may be involved.

Regarding the machinery use in the bakery…. What could be the sources of low frequency noise ?

1. Any motor that is not vibration isolated from the buildings structure can transmit low frequency noise into that structure and local structures sharing the same foundations or party walks. The frequency of the vibrations can vary and multiple motors could, in theory, creat interference noise patterns due to differing vibration frequencies. Frequency mixing can cause very strange effects, including a drone and beat noises, just as happens with multi engine aircraft from WWII. Low frequencies can result from the mixing of multiple higher frequency vibrations.

2. Ball race Bearings are used in machinery and these can be a source of noise and vibration. Ball race Bearings can be noisy in operation and when they fail they can be particularly noisy. He noise is usual, in the higher frequency ranges however. Frequency mixing remains a possibility however.

3. Drive shafts turning at high speeds need to be balanced. An imbalance in a drive shaft can cause all manner of issues with vibrations and bearing damage. Not sure a bake6 would use high speed drive shafts though.

4. Compressors are used in cooling systems and these are often a combination of an electric motor and a piston based compressor. The motor is capable of creating noise, as detailed above, and the compressor section is also capable of creating its own spectrum of noise and vibrations. Compressors can be very noisy in industrial settings. There are significant moving parts to create vibration. As previously stated, if the compressor is not vibration isolated from the building structure, it can transmit many vibrational frequencies into surrounding structures that have a common foundation or party wall.


As an example of how small a noise source can be and still become an issue, we have cats and one night I was hearing an annoying hum in our house. I searched the house for the noise source and it was the cats water fountain pump in a down stairs room. My wife had cleaned the tiny induction impeller pump and set the water flow at a different volume. The pump resonated at 50Hz when pumping at that volume. Another noise incident occurred some years ago that could mainly be heard in the quiet hours within our house. After investigation I traced the noise to our Honeywell 2 way central heating motorised valve that is held in the ‘central heating only’ position with a constant ac supply to the motor coil. The motor was humming at 50Hz.

Finally, there was a case of a lady having terrible problems with noise and vibration in her new home. The source was known….it was her washing machine. The problem was that the housing developer had placed the utility room at the centre of the house ground floor and this was where the washing machine was installed. The floor was a modern concrete / polystyrene block hybrid type and due to the floor design, it could act as a resonant diaphragm at low frequencies. The position of the washing machine at the centre of the house caused vibrations that were capable of making items walk off of shelving elsewhere in the house ! The solution was to move the utility room to the edge of the house floor plate but that involved major reworking of the house and the owner was understandably unhappy about this.

Low frequency vibrations are very common in industry and I fear that the OP will not be able to solve this problem easily as such vibrations can be very challenging to cure, even if the owner of the source is open to such measures.

Fraser

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