“Beginning at 127 to 133 dB, pressure”

That is pretty high pressure. If audible sound it spans the uncomfortable to dangerous regions, jet engine to jackhammer.

Do wind farms produce that kind of level?

 

Some people believe windmills cause cancer. Mostly caused by the noise they make - rEEeerrrrEEeerrrrEEeerrrrEEeerrr.

But to answer your question - No. EM fields from windmills have no effect on brains. Not on humans, not on mammals, not on reptiles, not on insects, and no - not even on bird brains either.

 

"Beginning at 127 to 133 dB, pressure sensation is experienced in the middle ear"
That is seriously loud. Yeah, a jackhammer or a jet engine at 100 yards.

Now I have no clue what the thread starter may or may not have but smartphones and smart watches can measure sound levels. Just find an app.

I watched this monster go up piece by piece. When finished I was maybe 200 yards away and never heard it. Matter of fact nobody I worked with ever mentioned hearing it. So how close must one be for an effect to be had? I have seen smaller units up close and personal and never noticed anything. Then too my hearing is not what it once was and an audiophile I sure am not.

Ron

 

“Beginning at 127 to 133 dB, pressure”

That is pretty high pressure. If audible sound it spans the uncomfortable to dangerous regions, jet engine to jackhammer.

Do wind farms produce that kind of level?

I agree it's high and unlikely to be that high at a normal power generator.

One measurement system.
https://docs.wind-watch.org/Sugimoto-et-al-infrasound-wind-turbine.pdf
Measurement of Infrasound Generated by Wind Turbine Generator

https://nanopdf.com/download/sound-power-measurements-according-to-iec-61400_pdf

 

I am relieved to know that I am not the only one who has never heard one of those giant wind turbines. And has anybody ever heard a recording of one? It would seem that if a sound is loud and bothersome that it could be recorded. I am aware of people who hear voices that nobody else can hear, and that those cannot be recorded either. Perhaps the sources are similar?

 

I am aware of people who hear voices that nobody else can hear

I only do what the voices in my wife's head tell me to do.

Ron

 

A small group of us did at one point go through an exercise to see how much of a magnetic pulse it would take to scramble hard drives and digital data tapes from a hundred feet way. The conclusion is that can't be done effectively without a nuclear explosion's worth of power. Of course that was many years ago. another "get rich quick" scheme foiled by physical reality.

 

I watched this monster go up piece by piece. When finished I was maybe 200 yards away and never heard it. Matter of fact nobody I worked with ever mentioned hearing it. So how close must one be for an effect to be had? I have seen smaller units up close and personal and never noticed anything. Then too my hearing is not what it once was and an audiophile I sure am not.

Ron

Clearly they did not plug it in with the proper line cord. Because if they had the definition, clarity, soundstage, detail, musicality, realism, dynamics, agility, bouquet, nose, finish, accuracy, frequency response, handling, durability, staying power, legality, and terminal ballistics of the sound would have overwhelmed and basically killed you right on the spot.

I mean, if you aren’t a tin ear philistine.

 

I am confused as to what in the world Y is referencing, since those wind turbines are multi-megawatt devices and not the sort of thing that gets "plugged in."
And I guess that all of us who own sound systems costing less than a new car, and who can not tell the difference in sounds between #14 lamp cord connecting the speakers and the $200 oxygen-free gold plated speaker connection cables must all be "tin-eared ".

 

Setup and wiring is the key to excellent sound. When I was a young man (boy at large) I had a stereo system in my room that consisted of two woofers, each in opposite corners of the ceiling, two mid-rangers in the other two corners, four dome tweeters, one in each corner; a 12 and 15 inch woofer behind my drums along with two horn tweeters, all accompanied by two tower speakers that consisted of two 10 inch woofers each, a 6 inch midrange in each and a dome tweeter in each. The difference between my system and my friends systems is that when they played their albums on my dual turn-tables they thought it wasn't their album because they never heard the nuances in the music that is actually there. My wife swore I wasn't playing HER "Lead Zeppelin" albums, that I must have had special cut versions of the same albums. Nope! It was the difference between my system and her fold down turn table with fold out speakers.

And yes, wiring CAN make the difference if you compare it to undersized cable. Most systems seem to run what appears to be 18 gauge. 14 gauge is hugely superior to 18. 12 gauge, unless you're running high power, doesn't offer much more in sound quality. But driving across America and having seen hundreds, if not a thousand or more, windmills, I must confess I've never stopped to listen for any sounds. But I would imagine they're not quite so noisy as described in post #23. They seem rather quiet to me. Now, a smaller one with much higher RPM blades, maybe they're louder. But again, I've not been around such.

 

That's the point of infrasound in humans, you can't normally hear it. Your body vibrates without a normal tonal hearing response. It's like the butt-shakers in the 3D ride, you feel acceleration forces not audio tones.

These are infrasonic transducers in my home theater.
https://forum.allaboutcircuits.com/threads/ht-old-home-theater-rebuild.183659/post-1716633

 

I used to work at a high school located on a peninsula into the Atlantic Ocean. There was a wind turbine on the property. It was silent most of the time. 600 students, a few dozen teachers and I were unaffected. During high ocean winds, it did make a shoosh shoosh sound, but that was rare.

 

By far, the most credible explanation for people feeling ill effects from a windmill is that they expected to, and therefore they do.

There are people who insist that that they are highly sensitive to EMF and experience all kinds if ill effects if they are in the vicinity of anything producing it. But in a blind test they cannot tell if the device is on or off.
.

 

I'm wondering if this is just one of those threads akin to "Is the mercury harmful in a fluorescent tube if the tube is broken" - or - "How many times does the current change direction in a 60Hz sinusoidal wave in one second" - or - like some other thread that really has no further interest than in attracting attention.

A man (or woman) convinced against his will
Is a man (or woman) of the same opinion still.

That is to say you can't convince someone who whole heartedly believes we never went to the moon or that the earth is anything BUT flat. And how many other issues there may be that I'm not aware of. JFK assassination - government conspiracy is another. And there are many more.

Unwatched!

 

Setup and wiring is the key to excellent sound. When I was a young man (boy at large) I had a stereo system in my room that consisted of two woofers, each in opposite corners of the ceiling, two mid-rangers in the other two corners, four dome tweeters, one in each corner; a 12 and 15 inch woofer behind my drums along with two horn tweeters, all accompanied by two tower speakers that consisted of two 10 inch woofers each, a 6 inch midrange in each and a dome tweeter in each. The difference between my system and my friends systems is that when they played their albums on my dual turn-tables they thought it wasn't their album because they never heard the nuances in the music that is actually there. My wife swore I wasn't playing HER "Lead Zeppelin" albums, that I must have had special cut versions of the same albums. Nope! It was the difference between my system and her fold down turn table with fold out speakers.

And yes, wiring CAN make the difference if you compare it to undersized cable. Most systems seem to run what appears to be 18 gauge. 14 gauge is hugely superior to 18. 12 gauge, unless you're running high power, doesn't offer much more in sound quality. But driving across America and having seen hundreds, if not a thousand or more, windmills, I must confess I've never stopped to listen for any sounds. But I would imagine they're not quite so noisy as described in post #23. They seem rather quiet to me. Now, a smaller one with much higher RPM blades, maybe they're louder. But again, I've not been around such.

I am aware that a lot of systems that I class as cheap junk use what appears to be about #24 wire for the long speaker connections. THAT is too small for any application beyond low power headphones, maybe. It does a lot to protect cheap speakers from high power, though.
But as I can never turn up my Marantz 2235 to even half power, #16 lamp cord for the ten foot connections is reasonable.

 

A single wind turbine spins at 15rpm and one of the three blades pass the tower every 1.3 seconds (0.7Hz). I don't know of anyone whoever complained about one of the single turbine installations like @Reloadron showed - installed by companies to give the appearance that they are doing something for the environment while essentially wasting lots of wind turbine materials in areas where wind is not optimal or scale of wind turbine servicing companies and supplies are remote so the turbines tend to be unused after the first few years of operation because of the high maintenance costs or lack of experts to keep them running.

That said, the 0.7Hz infrasound thump is not a big deal but when 10-20 are clustered in a field, the thumping frequency is near the 7-15Hz that visible flashes can induce seizure, vertigo and nausea in some people. I don't see why the same 7-15Hz as infrasound instead of visible flashes can be so easily be dismissed by so many "experts". Especially since there are few places on earth - man-made or otherwise, that can make those thumps in excess of 100dB.

 

A single wind turbine spins at 15rpm and one of the three blades pass the tower every 1.3 seconds (0.7Hz). I don't know of anyone whoever complained about one of the single turbine installations like @Reloadron showed - installed by companies to give the appearance that they are doing something for the environment while essentially wasting lots of wind turbine materials in areas where wind is not optimal or scale of wind turbine servicing companies and supplies are remote so the turbines tend to be unused after the first few years of operation because of the high maintenance costs or lack of experts to keep them running.

That said, the 0.7Hz infrasound thump is not a big deal but when 10-20 are clustered in a field, the thumping frequency is near the 7-15Hz that visible flashes can induce seizure, vertigo and nausea in some people. I don't see why the same 7-15Hz as infrasound instead of visible flashes can be so easily be dismissed by so many "experts". Especially since there are few places on earth - man-made or otherwise, that can make those thumps in excess of 100dB.

The monster I referenced in post 24:
"How fast can the blades travel? Blade tip speed is 165 mph at a hub rotation of 14.1 rpm"

Another fact of interest is that Lincoln Electric like any major corporation looks at return on investment. The project cost for that 2.5 MW unit was $10,000,000. They freely admit they would not have invested the ten million had the US government picked up 25% of the cost. It simply wasn't worth it. When built it was the largest wind turbine on the North American continent. No clue if that holds true today but that sucker is big.

Ron

 

In 3 weeks time we are discharging in Patagonia a park of 18 windmills (Vestas) 4,2 MW. BTW blades are 74 m long; the longest coming down here, ever

 

In 3 weeks time we are discharging in Patagonia a park of 18 windmills (Vestas) 4,2 MW. BTW blades are 74 m long; the longest coming down here, ever

Interpreting and understanding what that statement actually means, the meaning is far from obvious. What is being stated?
How does one "discharge" a park??? Or is this a translation problem with a different meaning being intended??

Will each turbine/generator produce that much power, or is that for the whole array of 18 of them??

 

I read it to mean a new wind farm of 18 units will be put in service in 3 weeks.