On Thu, 7 Dec 2023 20:17:30 -0800 (PST), Anthony William Sloman <bill.sloman@ieee.org> wrote:

On Friday, December 8, 2023 at 1:55:05?PM UTC+11, a a wrote:

On Thursday 7 December 2023 at 15:28:22 UTC+1, a a wrote:

On Thursday 7 December 2023 at 13:33:13 UTC+1, Anthony William Sloman wrote:

<snip>

Wind farm syndrome is a term used to describe the adverse human health effects related to the proximity of wind turbines1. These effects include congenital abnormality, cancer, and death1. Individuals living fairly close to wind farms can develop a

cluster of health symptoms that may include dizziness, migraines, high blood pressure, depression, and sleep deprivation2.


Depends on the distance between wind turbine and house, soil quality
etc.

People who don't like wind farms will lie like fury about their imaginary side-effects. It's an aspect of the Not in My Back Yard (NIMBY) syndrome, which is well known (if not to a a ).

<snipped the rest of the lunatic drivel>

There are different rules of thumb how close wind turbines should be
placed relative to inhabited areas.

One states that the distance from the wind turbine to the nearest
house should be at least 20 times the turbine height. This will
attenuate the infra sound and also limit sunlight flicker to only
short periods in the morning and evenings when the sun is close to the
horizon. That distance also reduces the risk of ice falling from the
blades as well as dead birds hit by the turbine blades.

Building wind turbines too close to inhabited areas will reduce the
general acceptance of wind power and renewable energy in general.

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On Thu, 7 Dec 2023 20:10:17 -0800 (PST), Anthony William Sloman <bill.sloman@ieee.org> wrote:

On Friday, December 8, 2023 at 5:38:41?AM UTC+11, Fred Bloggs wrote:

It can if it sets up a resonance, especially in a large cavity like the chest. That will set up displacement amplitudes in body parts such as the sternum, trachea, and lungs, which are much greater than an SPL reading would convey. From there anything

can happen as it involves critical nervous system components and whatever it is they're controlling, like heart rhythm.

Rubbish. That kind of movement is very heavily damped. The human body isn't any kind of high-Q resonator.

I was once setting up the equipment for a band and standing next to
the base guitar speaker. I took the base guitar and played some chords
to test the setup.

I did not notice that the volume control was close to maximum and felt
quite uncomfortable in my internal organs due to the resonances.

After this event I always check the volume control before doing such
tests :-).

In a bass guitar, the strings are quite close in frequency, so the
difference frequency could be in the infra sound area. Apparently
there were some non-linearity in the amplifier, speaker or human
organs to generate such difference frequencies (and not just a long
sequences of the multiple frequencies).

For centuries, medium size pipe organs can generate the feeling of
very low tones (which would require huge pipes) by sounding two medium
size pipes, which are close in frequency. Apparently the human
physiology generates these 'difference frequencies'. To find such
difference frequencies with a spectrum analyzer would require some non-linearity to generate difference (and sum) mixing products.

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On 08/12/2023 11:08, upsidedown@downunder.com wrote:

<snip>

I was once setting up the equipment for a band and standing next to
the base guitar speaker. I took the base guitar and played some chords
to test the setup.

I did not notice that the volume control was close to maximum and felt
quite uncomfortable in my internal organs due to the resonances.

Driving over cattle grids is similar, though fortunately the duration is
short.

(I suppose that's why cows don't drive over them.)

--
Cheers
Clive

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On Fri, 8 Dec 2023 11:46:13 +0000, Clive Arthur
<clive@nowaytoday.co.uk> wrote:

On 08/12/2023 11:08, upsidedown@downunder.com wrote:

<snip>

I was once setting up the equipment for a band and standing next to
the base guitar speaker. I took the base guitar and played some chords
to test the setup.

I did not notice that the volume control was close to maximum and felt
quite uncomfortable in my internal organs due to the resonances.

Driving over cattle grids is similar, though fortunately the duration is >short.

(I suppose that's why cows don't drive over them.)

More cowbell !!

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